JP7508974B2 - JOB MANAGEMENT DEVICE, JOB MANAGEMENT SYSTEM, JOB MANAGEMENT METHOD, AND JOB MANAGEMENT PROGRAM - Google Patents

Description

The present invention relates to a job management device, a job management system, a job management method, and a job management program.

In preparation for a failure of the active system, a standby system that replicates the data of the active system may be prepared. If a failure occurs in the active system, system operation can be continued by switching from the active system to the standby system.

Let us assume that there is a system including a job execution device and a job management device that operate as a standby system in preparation for a failure of the system including the job execution device and the job management device that operate as an active system.

Here, a device that executes a job is called a job execution device. The job execution device stores the results obtained by executing the job and information about the executed job. In addition, the results and information about the executed job stored in the active job execution device are asynchronously replicated (copied) to the standby job execution device.

A device that manages jobs to be executed by a job execution device is called a job management device. The job management device stores information related to job management, which is information used to determine whether or not to execute a job on a job execution device. The job management information stored in the active job management device is asynchronously replicated to the standby job management device.

In the active system, jobs executed by a job execution device included in the active system are indicated as having been executed in information about the executed jobs. Jobs executed by a job execution device are also indicated as having been executed in information about job management of a job management device.

As described above, because replication is performed asynchronously, the timing of replication differs for each active job execution device and job management device. Therefore, when the system is switched, a job that is indicated as executed in the information about the executed job that is replicated to the job execution device of the standby system may be indicated as not executed in the information about job management that is replicated to the job management device of the standby system. In this way, when the system is switched to the standby system, there is a possibility that the information about the executed job that is replicated to the job execution device of the standby system and the information about job management of the job management device of the standby system will not be consistent. If the information about the executed job that is replicated to the job execution device of the standby system and the information about job management of the job management device of the standby system are not consistent, problems may occur in the job management system of the standby system.

For example, suppose that the result of a job that is indicated as having been executed in the information on management of the standby job management device has not been replicated on the standby job execution device. In this case, even if the standby job management device instructs the standby job execution device to execute a job that uses an unreplicated result as input, the standby job execution device cannot execute the job. In this case, the information on the executed job that is replicated on the standby job execution device indicates that the job that obtains the unreplicated result has not been executed.

In this way, if the information about job management in the standby job management device is not consistent with the information about executed jobs that is copied to the standby job execution device, problems may occur after the system is switched to the standby system.

In response to this, Patent Document 1 proposes that a job management device creates or updates a jobnet definition or a jobnet based on a job template prepared by a job designer. A jobnet definition includes jobs and the order in which the jobs are executed. A jobnet is data that is actually input into a system that executes the jobs.

Patent Document 2 also proposes that when switching from an active system to a standby system, information about data for which replication has not been completed in the old active system is stored in the new active system. This enables the processing processor of the new active system to check whether or not necessary data has been replicated based on information about data for which replication has not been completed. Furthermore, if necessary data has not been replicated, the processing processor of the new active system can cause the processing processor of the old active system to replicate the necessary data.

Patent Document 3 also proposes that when a system including multiple hosts is interrupted, other hosts start jobs that are determined to have been running on the failed host at the time the failure occurred, based on information about the job's operation.

International Publication No. 2010/050524 JP 2005-056287 A Japanese Patent Application Laid-Open No. 06-124214

However, Patent Document 1 does not mention reducing the possibility of problems occurring when the job management device replicates information related to job management on a standby job management device and information related to executed jobs on a standby job execution device.

In addition, the method described in Patent Document 2 can reduce the possibility of the above-mentioned inconvenience occurring by storing information about data for which replication of the old operating system has not been completed in the new operating system. However, with this method, replication is performed after the system is switched, so the system cannot be quickly restored.

In addition, in the method described in Patent Document 3, when the system is switched to a standby system, the job management device of the standby system cannot identify the job to be executed by the job execution device. This is because there is a possibility that the job indicated as being executed in the information on job management of the standby system job management device does not match the job indicated as being executed in the information on jobs executed by the standby system job execution device. Therefore, the job management device of the standby system may experience inconvenience because the information on job management copied to the standby system job management device does not match the information on executed jobs copied to the standby system job execution device.

As described above, in any of the methods described in Patent Documents 1 to 3, the standby job management device cannot quickly restore the system while reducing the possibility of inconvenience caused by inconsistency between information on job management copied to the standby job management device and information on executed jobs copied to the standby job execution device. The methods described in Patent Documents 1 to 3 have the problem of being unable to quickly restore the system.

The object of the present invention is to provide a job management device, system, method, and program that can shorten the time it takes to restore the system.

In one aspect of the present invention, the job management device includes an acquisition unit that acquires execution information when a failure occurs from a standby job execution device that has been copied before a failure occurs in a system including the active job execution device, in which a result of a job executed by the active job execution device that executes the job and execution information indicating the status of job execution of the active job execution device are acquired; an identification unit that determines whether or not to cause the standby job execution device to execute a job based on management information, which is information for determining whether or not to cause the standby job execution device to execute a job, and the acquired execution information, and identifies the job that has been determined to be executed as a job to be executed by the standby job execution device; and a control unit that causes the standby job execution device to execute the identified job.

In another aspect of the present invention, the job management method acquires execution information from a standby job execution device that has been copied before a failure occurs in a system including the active job execution device, which contains a product of the job executed by the active job execution device that executes the job and execution information indicating the status of the job execution by the active job execution device, and determines whether or not to cause the job to be executed by the standby job execution device based on management information, which is information for determining whether or not to cause the job to be executed by the standby job execution device, and the acquired execution information, identifies the job that has been determined to be executed as a job to be executed by the standby job execution device, and causes the standby job execution device to execute the identified job.

In another aspect of the present invention, the job management program causes the computer to realize an acquisition function for acquiring execution information when a failure occurs, from a standby job execution device to which a product of a job executed by an active job execution device that executes the job and execution information indicating the status of job execution by the active job execution device were copied before a failure occurred in a system including the active job execution device; an identification function for determining whether or not to cause a job to be executed by the standby job execution device based on management information, which is information for determining whether or not to cause a job to be executed by the standby job execution device, and the acquired execution information, and for identifying a job determined to be executed as a job to be executed by the standby job execution device; and a control function for causing the standby job execution device to execute the identified job.

The job management device, system, method, and program of the present invention make it possible to reduce the time it takes to restore the system.

1 is a block diagram showing an example of the configuration of a job management device according to a first embodiment of the present invention; 5 is a flowchart showing an example of the operation of the job management device according to the first embodiment of the present invention. 11 is a diagram illustrating an example of the configuration of a job management system for a standby system and a job management system for an active system according to a second embodiment of the present invention. FIG. 11 is a block diagram showing an example of the configuration of a job management system for a standby system according to a second embodiment of the present invention. FIG. 11 is a diagram illustrating an example of a time storage table of a job management device of a standby system according to a second embodiment of the present invention. 13 is a diagram illustrating an example of an acquisition/execution information storage table of a job management device of a standby system according to the second embodiment of the present invention. 13 is a diagram illustrating an example of a management information storage table in a job management device of a standby system according to the second embodiment of the present invention. 13 is a diagram illustrating an example of a management information storage table in a job management device of a standby system according to the second embodiment of the present invention. 13 is a diagram illustrating an example of a management information storage table in a job management device of a standby system according to the second embodiment of the present invention. FIG. 13 is a diagram showing an example of a job net definition storage table of the standby job management device of the present invention. FIG. 11 is a block diagram showing an example of the configuration of a job management system for an active system according to a second embodiment of the present invention. 13 is a diagram illustrating an example of a management information storage table of an active job management device according to the second embodiment of the present invention. 11 is a diagram illustrating an example of the operation of an active job execution device and a standby job execution device according to the second embodiment of the present invention. 13 is a diagram illustrating an example of the operation of a job management device of an active system and a job management device of a standby system according to the second embodiment of the present invention. FIG. 11 is a diagram illustrating an example of the operation of a job management system for a standby system according to a second embodiment of the present invention. 10 is a flowchart illustrating an example of the operation of a job management device of a standby system according to a second embodiment of the present invention. FIG. 11 is a schematic diagram showing a job execution order according to a second embodiment of the present invention. 10 is a flowchart illustrating an example of the operation of a job management device of a standby system according to a second embodiment of the present invention. FIG. 2 is a block diagram showing an example of a hardware configuration according to each embodiment of the present invention.

[First embodiment]
A first embodiment of the present invention will be described.

FIG. 1 is a block diagram showing an example of the configuration of a job management device 1 according to this embodiment. The job management device 1 according to this embodiment includes an acquisition unit 11, a specification unit 12, and a control unit 13.

The job management device 1 is included in a standby system. The standby system includes a job execution device (not shown) (hereinafter, the job execution device (not shown) will be simply referred to as a job execution device). The job execution device executes jobs. If a failure occurs in the active system, the job management device 1 causes the job execution device in the standby system to execute the job.

The acquisition unit 11 acquires execution information from a standby job execution device when a failure occurs in a system including an active job execution device. The standby job execution device stores a copy of the results of a job executed by the active job execution device and execution information indicating the status of job execution on the active job execution device before the failure occurs.

The identification unit 12 determines whether or not each job should be executed by a job execution device in the standby system based on the management information and the execution information acquired by the acquisition unit 11, and identifies the job determined to be executed as a job to be executed by a job execution device in the standby system. The management information is information for determining whether or not a job should be executed by a job execution device in the standby system. The management information is stored in a memory unit (not shown) included in the job management device 1.

The control unit 13 causes the job execution device in the standby system to execute the identified job.

In this way, the job management device 1 acquires execution information from the standby job execution device that executes the job when a failure occurs in a system including the active job execution device. In the standby job execution device, the results of the job executed by the active job execution device and the execution information indicating the execution status of the job in the active job execution device are copied before the failure occurs. Furthermore, the job management device 1 determines whether or not to cause the standby job execution device to execute each job based on management information, which is information for determining whether or not to cause the standby job execution device to execute the job, and the execution information acquired from the standby job execution device, and identifies the job that is determined to be executed as the job to be executed by the standby job execution device. Furthermore, the job management device 1 causes the standby job execution device to execute the identified job.

In this way, when a failure occurs, the job management device 1 can quickly determine whether or not each job needs to be executed on the standby job execution device based on the management information and the execution information that was copied before the failure occurred. The job management device 1 can then start operating the standby system by utilizing the results of the job executed by the active job execution device that was copied to the standby job execution device before the failure occurred. This makes it possible to quickly restore the system.

Next, an example of the operation of the job management device 1 of this embodiment will be described with reference to FIG. 2. FIG. 2 is a flowchart showing an example of the operation of the job management device 1.

When a failure occurs in a system including an active job execution device that executes a job, the acquisition unit 11 acquires execution information from a standby job execution device (step S101). The standby job execution device stores copies of the results of the job executed by the active job execution device and execution information indicating the status of job execution on the active job execution device before the failure occurs.

The identification unit 12 determines whether or not each job is to be executed by a job execution device in the standby system based on the management information and the execution information acquired by the acquisition unit 11, and identifies the job determined to be executed as a job to be executed by a job execution device in the standby system (step S102). The management information is information for determining whether or not a job is to be executed by a job execution device in the standby system.

The control unit 13 causes the job execution device in the standby system to execute the identified job (step S103).

In this way, the job management device 1 determines whether or not to cause the job execution device of the standby system to execute each job based on the management information, which is information for determining whether or not to cause the job to be executed by the job execution device of the standby system, and the execution information acquired from the job execution device of the standby system, and identifies the job determined to be executed as the job to be executed by the job execution device of the standby system. In addition, the job management device 1 causes the job execution device of the standby system to execute the identified job. In this way, when a failure occurs, the job management device 1 can quickly determine whether or not each job needs to be executed in the job execution device of the standby system based on the management information and the execution information that was copied before the failure occurred. Then, the job management device 1 can start operating the system of the standby system by utilizing the results of the job executed by the job execution device of the active system that was copied to the job execution device of the standby system before the failure occurred. This makes it possible to quickly restore the system.

[Second embodiment]
Next, the job management device 4 according to the second embodiment of the present invention will be specifically described.

First, an example of the configuration of a standby job management system 2 including a job management device 4 will be described with reference to Figs. 3 and 4. Fig. 3 is a diagram showing an example of the configuration of a standby job management system 2 and an active job management system 5 in this embodiment. Fig. 4 is a block diagram showing an example of the configuration of the job management system 2 in this embodiment.

As shown in Figures 3 and 4, the standby job management system 2 of this embodiment includes standby job execution devices 3a, 3b, 3c, ..., 3n and a standby job management device 4. (Hereinafter, each of the job execution devices 3a, 3b, 3c, ..., 3n will be referred to as a "job execution device 3.") For example, the standby job management system 2 is a backup system for an active system used by a business that automates business operations using a job management system. Also, as shown in Figure 3, the standby job management system 2 is connected to the active job management system 5 by wired or wireless communication. The number of job execution devices included in the standby job management system 2 can be one or more than two.

As shown in FIG. 3, the active job management system 5 includes active job execution devices 6a, 6b, 6c, ..., 6n and an active job management device 7. (Hereinafter, each of the job execution devices 6a, 6b, 6c, ..., 6n is referred to as a "job execution device 6.") For example, the active job management system 5 is an active system used by a business that automates business operations using a job management system. Each active job execution device 6 replicates information by a predetermined standby job execution device 3 that is associated with it in advance. In this embodiment, each active job execution device 6 is associated one-to-one with the standby job execution device 3. In this embodiment, the number of active job execution devices 6 is the same as the number of standby job execution devices 3. Note that a given active job execution device 6 may be associated with multiple standby job execution devices 3. Also, a given standby job execution device 3 may be associated with multiple active job execution devices 6. In this case, the number of active job execution devices included in the job management system 5 may be one or any number of multiple devices, two or more. Details of the active job execution device 6 and the active job management device 7 will be described later.

Next, the standby job execution device 3 and the standby job management device 4 will be described in detail with reference to Figures 3 and 4.

First, the job execution device 3 of this embodiment will be described with reference to FIG.

When no failure occurs in the job management system 5 of the active system, the job execution device 3 of the standby system asynchronously replicates the results of the job executed by the job execution device 6 of the active system, which is associated with the job execution device 6 in advance, and the execution information at a predetermined timing. The execution information is information contained in the execution information storage table of the active system. The execution information contained in the execution information storage table of the active system indicates the execution status of the job of the job execution device 6 of the active system. In addition, when the system is switched to the job management system 2 of the standby system, the job execution device 3 of the standby system receives control information instructing the job to be executed from the job management device 4 of the standby system, and executes the job based on the received control information.

For example, suppose that the standby job execution device 3a shown in FIG. 3 replicates the deliverables of the active job execution device 6a and the information contained in the execution information storage table. Also, suppose that the standby job execution device 3b replicates the deliverables of the active job execution device 6b and the information contained in the execution information storage table. In this case, the time at which the standby job execution device 3a replicates the deliverables and the information contained in the execution information storage table is different from the time at which the job execution device 3b replicates the deliverables and the information contained in the execution information storage table.

Next, an example of the configuration of the job execution device 3 of this embodiment will be described with reference to FIG.

The job execution device 3 includes an output unit 31, an execution unit 32, a data storage unit 33, an execution information storage unit 34, and a replication unit 35.

The output unit 31 includes a time output unit 311 and an execution information output unit 312.

When the time output unit 311 is requested by the time acquisition unit 411 of the standby job management device 4 to output the replication time information, it outputs the device identification information of the standby job execution device 3 and the replication time information stored in the execution information storage unit 34. The device identification information includes information that identifies the standby job execution device 3. The replication time information includes information indicating the time when the replication unit 35 of the standby job execution device 3 replicated the deliverables of the active job execution device 6 and the information included in the execution information storage table. The time output unit 311 of this embodiment outputs replication time information indicating the time when the replication unit 35 of the standby job execution device 3 last replicated.

The execution information output unit 312 receives the confirmed time information from the execution information acquisition unit 412 of the job management device 4 of the standby system. The confirmed time information indicates the time when the last replicated device among the devices included in the job management device 5 of the active system was replicated before a failure occurred. The time indicated by the confirmed time information is regarded as the confirmed time. The execution information output unit 312 is also requested by the execution information acquisition unit 412 of the job management device 4 of the standby system to output information contained in the execution information storage table. Specifically, the execution information output unit 312 is requested to output information contained in the execution information storage table related to jobs that satisfy both of the following two conditions. Hereinafter, a job that satisfies both of the following two conditions will be referred to as a job that satisfies the execution information output condition.

The first condition is that the execution information associated with the job indicates that the job has been executed or is in an executing state. The execution information indicates the execution state of the job of the active job execution device 6 corresponding to the standby job execution device 3 at the time of replication by the replication unit 35. The execution state of the job indicated by the execution information includes a state in which the active job execution device 6 has finished executing the job ("Completed"), a state in which the active job execution device 6 has started executing the job but has not finished executing it ("Executing"), or a state in which the job execution has not started executing it ("Not Executed"). In the following explanation, the state of a job that has finished executing is referred to as "executed". The state in which execution has started but has not finished executing is referred to as "Executed".

The second condition is that the following condition (a) or (b) is satisfied. A job that satisfies condition (a) or (b) is a job that the active job execution unit 6 was executing at the time indicated by the confirmed time information, or a job that the active job execution unit 6 started executing after the time indicated by the confirmed time information.
(a) The time indicated by the end time information related to the execution information associated with the job indicates a time later than the time indicated by the confirmed time information.
(b) The end time information related to the execution information associated with the job is not stored in the execution information storage table.

The start time information indicates the time when the active job execution device 6 starts executing the job. The end time information indicates the time when the active job execution device 6 ends executing the job.

The execution information output unit 312 outputs the device identification information of the standby job execution device 3 and information included in the execution information storage table stored in the execution information storage unit 34 that is related to the job that satisfies the execution information output condition. Among the information included in the execution information storage table, the information to be output is the execution information ("Completed" or "Executing"), and the job identification information, start time information, and end time information related to the execution information. The job identification information is information that identifies the job. The execution information, start time information, and end time information output in this case are information replicated by the replication unit 35 of the standby job execution device 3 from the execution information storage table of the active job execution device 6 to the execution information storage table of the standby job execution device 3. In addition, the execution information output unit 312 outputs information related to the deliverable when requested by the determination unit 422 of the standby job management device 4. The information related to the deliverable will be described later.

The replication unit 35 asynchronously replicates the results of a job executed by the job execution device 6 of the active system and the information contained in the execution information storage table stored in the job execution device 6 of the active system at a predetermined timing. The results of a job are, for example, a file obtained by the execution of a job or a database record updated by the execution of a job. The execution information storage table stored in the job execution device 6 of the active system, which is the target of replication, includes the following information. The execution information storage table stored in the job execution device 6 of the active system includes job identification information of a job executed by the job execution device 6 of the active system, execution information indicating the execution status of the job of the job execution device 6 of the active system, start time information, and end time information. The execution information stored in the execution information storage table of the job execution device 6 of the active system includes information indicating that the execution of the job has been completed ("Completed"), information indicating that the execution of the job has started but not yet been completed ("Executing"), or information indicating that the execution of the job has not yet been started ("Not Executed"). The execution information, start time information, and end time information stored in the execution information storage table of the active job execution device 6 are associated with job identification information.

Specifically, the replication unit 35 receives the results of a job executed by the active job execution device 6, and replicates the results to the data storage unit 33 of the standby job execution device 3, or to a remote storage (not shown) included in the standby job management system 2. The replication unit 35 also receives information included in the execution information storage table of the active job execution device 6, and replicates the received information to the execution information storage table stored in the execution information storage unit 34 of the standby job execution device 3. Furthermore, the replication unit 35 stores replication time information indicating the time of replication in the execution information storage unit 34. The replication unit 35 of this embodiment stores replication time information in the execution information storage unit 34 each time replication is performed.

The data storage unit 33 stores the results of the job. The data storage unit 33 also stores a database. The results of the job and the database may be stored in a remote storage included in the job management system 2 of the standby system, rather than in the data storage unit 33 (local) of the job execution device 3 of the standby system. When no failure occurs in the job management system 5 of the active system, the results of the job stored in the data storage unit 33 are the results of the job executed by the job execution device 6 of the active system, which are replicated by the replication unit 35 of the job execution device 3 of the standby system. When a failure occurs in the job management system 5 of the active system, the execution unit 32 of the job execution device 3 of the standby system stores the results of the executed job in the data storage unit 33 or in the remote storage included in the job management system 2 of the standby system.

The execution information storage unit 34 stores an execution information storage table (not shown) and replication time information. The execution information storage table includes job identification information of the job to be executed, execution information, start time information, and end time information. The information included in the execution information storage table output by the execution information output unit 312 to the standby job management device 4 is stored by the execution information acquisition unit 412 in the acquired execution information storage table (Figure 6) stored in the acquired information storage unit 44.

When the job management device 4 of the standby system receives instruction information instructing the system to switch to the job management system 2 of the standby system, the execution information storage table stored in the execution information storage unit 34 of the job execution device 3 of the standby system contains information replicated from the execution information storage table of the job execution device 6 of the active system. The replication time information stored in the execution information storage unit 34 is stored by the replication unit 35. When the execution unit 32 executes a job, the execution unit 32 stores the execution information, start time information, and end time information in the execution information storage table stored in the execution information storage unit 34. In this embodiment, when the job management device 4 of the standby system receives instruction information instructing the system to switch to the job management system 2 of the standby system, the system is switched from the job management system 5 of the active system to the job management system 2 of the standby system.

The execution unit 32 receives control information instructing the job to be executed, including job identification information of the job to be executed, from the job management device 4 of the standby system. The execution unit 32 of the job execution device 3 of the standby system stores start time information indicating the time when execution of the job started and execution information ("executing") in the execution information storage table stored in the execution information storage unit 34. The execution unit 32 also outputs the job identification information of the job that has started to be executed and the start time information of the job to the job management device 4 of the standby system. The execution unit 32 executes the job based on the received control information. When a local file is created by the execution of the job, the execution unit 32 stores the file, which is the result, in the data storage unit 33. When a remote file is created by the execution of the job, the execution unit 32 stores the file in the remote storage included in the job management system 2 of the standby system. When a specific record of the database is updated by the execution of the job, the execution unit 32 updates a specific record of the database stored in the data storage unit 33 or the remote storage included in the job management system 2 of the standby system. Furthermore, the execution unit 32 stores end time information indicating the time when the execution of the job ended and execution information indicating the state in which the execution of the job ended ("Complete") in the execution information storage table stored in the execution information storage unit 34. The execution unit 32 also outputs the job identification information of the job that has finished execution and the end time information of the job to the job management device 4 of the standby system.

Next, the job management device 4 of this embodiment will be described with reference to FIG.

The standby job management device 4 performs the following operation if no failure has occurred in the active job management system 5. The standby job management device 4 asynchronously replicates information contained in a management information storage table stored in a job management device 7 included in the active job management system 5 from the job management device 7 at a predetermined timing. The management information is information for determining whether or not to cause a job to be executed by the standby job execution device 3. The management information in this embodiment includes information contained in the management information storage table and the jobnet definition storage table (Figure 10).

When the job management device 4 of the standby system receives instruction information instructing the system to switch to the job management system 2 of the standby system, the management information storage table stored in the job management device 4 of the standby system is a copy of the management information storage table stored in the job management device 7 of the active system. After the system is switched to the job management system 2 of the standby system, the management information storage table stored in the job management device 4 of the standby system indicates information on jobs to be executed by the job execution device 3 of the standby system. Furthermore, when the system is switched to the job management system 2 of the standby system, the job management device 4 of the standby system outputs control information instructing the job to be executed to the job execution device 3 of the standby system.

For example, suppose that the standby job management device 4 shown in FIG. 3 replicates information contained in the management information storage table of the active job management device 7. In this case, the time at which each of the standby job execution devices 3a to 3n replicates the deliverables and the information contained in the execution information storage table differs from the time at which the standby job management device 4 replicates the information contained in the management information. For this reason, there may be cases where the information contained in the management information storage table replicated in the standby job management device 4 at the time a failure occurs in the active job management device 5 is inconsistent with the information contained in the execution information storage table replicated in the standby job management device 4. Details of the management information storage table will be described later.

Next, an example of the configuration of the job management device 4 of this embodiment will be described with reference to FIG.

The job management device 4 includes an acquisition unit 41, an identification unit 42, and a control unit 43.

The reception unit 47 is connected to the acquisition unit 41. The reception unit 47 receives instruction information instructing a system switch to the standby job management system 2. The reception unit 47 then requests the time acquisition unit 411 to acquire the replication time information. In this embodiment, the reception unit 47 receives instruction information instructing a system switch to the standby job management system 2 from any one of the active job execution device 6 and the active job management device 7 included in the active job management system 5 that has detected a fault.

The acquisition unit 41 includes a time acquisition unit 411 and an execution information acquisition unit 412.

When the time acquisition unit 411 is requested by the reception unit 47 to acquire the replication time information, the time acquisition unit 411 requests the standby job execution device 3 to output the replication time information. The time acquisition unit 411 also receives the device identification information of the standby job execution device 3 and the replication time information from the time output unit 311 of the standby job execution device 3. The time acquisition unit 411 of the standby job management device 4 stores the device information ("job execution device") indicating that the received information is the information of the standby job execution device 3, and the received device identification information and replication time information of the standby job execution device 3 in the time storage table (FIG. 5) stored in the acquired information storage unit 44. The device information is information indicating whether the device that performed the replication is the standby job execution device 3 or the standby job management device 4. FIG. 5 shows an example of the time storage table of this embodiment. The time storage table includes the device identification information of the device that performed the replication, the device information indicating whether the device that performed the replication is the job execution device 3 or the job management device 4, and the replication time information indicating the time when the replication was performed. The time acquisition unit 411 stores the replicated time information of all job execution devices 3 included in the standby job management system 2 in a time storage table in the acquired information storage unit 44 of the standby job management device 4. The time acquisition unit 411 also outputs to the execution information acquisition unit 412 confirmed time information indicating the oldest time among the replicated time information stored in the time storage table in the acquired information storage unit 44.

When the execution information acquisition unit 412 receives the confirmed time information from the time acquisition unit 411, it performs the following operation. The execution information acquisition unit 412 outputs the confirmed time information to the execution information output unit 312 of the job execution device 3 of the standby system. In addition, the execution information acquisition unit 412 of the job management device 4 of the standby system requests the execution information output unit 312 of the job execution device 3 of the standby system to output information contained in the execution information storage table related to the job that satisfies the execution information output condition described above. In addition, the execution information acquisition unit 412 of the job management device 4 of the standby system receives the device identification information of the job execution device 3 of the standby system, the job identification information related to the job that satisfies the execution information output condition, the execution information ("Completed" or "Executing"), the start time information, and the end time information from the execution information output unit 312 of the job execution device 3 of the standby system. The execution information acquisition unit 412 of the standby job management device 4 stores the information received from the execution information output unit 312 of the standby job execution device 3 in an acquired execution information storage table, an example of which is shown in FIG. 6, stored in the acquired information storage unit 44. The execution information acquisition unit 412 stores the information contained in the execution information storage table of all job execution devices 3 included in the standby job management system 2 in the acquired execution information storage table stored in the acquired information storage unit 44 of the standby job management device 4. The execution information acquisition unit 412 also outputs the confirmed time information to the confirmation unit 421.

The acquired information storage unit 44 is connected to the acquisition unit 41. The acquired information storage unit 44 stores a time storage table and an acquired execution information storage table. The time storage table includes device identification information of the device that performed the replication, device information indicating whether the device that performed the replication is a job execution device 3 or a job management device 4, and replication time information indicating the time when the replication was performed. The acquired execution information storage table includes job identification information indicating the job that has started to be executed, device identification information indicating the device that executes the job, execution information, start time information, and end time information.

In the example of the time storage table of this embodiment shown in FIG. 5, for the job execution devices 3 in standby whose device identification information is "AG1" to "AG4", replication time information indicating the time when each job execution device 3 performed replication is stored in the time storage table. Also, for the job management device 4 in standby whose device identification information is "MG", replication time information indicating the time when the job management device 4 performed replication is stored in the time storage table. The replication time information of the job execution device 3 is stored in the time storage table by the time acquisition unit 411. The replication time information of the job management device 4 is stored in the time storage table by the replication unit 48. For example, the first row indicates that the job management device 4 whose device identification information is "MG" performed replication at "9:10".

Figure 6 shows an example of the acquired execution information storage table of this embodiment. In this example, for each job with job identification information "JOB2", "JOB3-1", "JOB3-2", "JOB5-1", and "JOB5-2", the acquired execution information storage table stores the device identification information of the job execution device 3 that executes the job, execution information indicating the execution status of the job, start time information, and end time information.

The management information storage unit 45 is connected to the identification unit 42 and the replication unit 48. The management information storage unit 45 stores a management information storage table. The management information storage table includes job identification information, and also includes, for the job indicated by the job identification information, device identification information of the job execution device 3 that executes the job, execution status information, start time information, and end time information. Until the reception unit 47 of the standby job management device 4 receives instruction information instructing a system switch to the standby job management system 2, the execution status information indicates the status of job management by the corresponding active job management device 7 at the time when the replication unit 48 replicates the information included in the active management information storage table.

FIGS. 7 to 9 show examples of management information storage tables stored in the management information storage unit 45 in this embodiment. In the examples of FIG. 7 to FIG. 9, for each of the jobs with job identification information "JOB1", "JOB2", "JOB3-1", "JOB3-2", "JOB4", "JOB5-1", "JOB5-2", and "JOB6", the device identification information of the job execution device 3 that executes the job, execution status information, start time information, and end time information are stored in the management information storage table.

Figure 7 is an example of the management information storage table at the time when the standby job management device 4 receives instruction information instructing switching to the standby job management system 2. Figure 8 is an example of the management information storage table after the determination unit 421 has determined the execution status information of a job whose execution status information included in the management information storage table matches the job status indicated by the execution information stored in the standby job execution device 3. Figure 9 is an example of the management information storage table after the determination unit 422 has determined whether or not to cause the standby job execution device 3 to execute the job for which execution status information has not been determined.

Before the standby job management device 4 receives instruction information instructing the system to switch to the standby job management system 2, the management information storage table (FIG. 7) stored in the management information storage unit 45 contains information replicated by the replication unit 48 from the management information storage table of the active job management device 7. In this case, the execution status information contains information indicating that the active job execution device 6 has finished executing the job ("Complete"), information indicating that the active job execution device 6 has not started executing the job ("Not Executed"), or information indicating that the active job execution device 6 has started executing the job but has not finished executing it ("Executing"). Furthermore, in this case, the start time information contained in the standby management information storage table is information indicating the time when the active job execution device 6 started executing the job. Furthermore, the end time information contained in the standby management information storage table is information indicating the time when the active job execution device 6 finished executing the job.

When the standby job management device 4 receives instruction information instructing a system switch to the standby job management system 2, the management information storage table stored in the management information storage unit 45 stores information by the identification unit 42 and the control unit 43. The identification unit 42 includes a determination unit 421 and a determination unit 422.

The determination unit 421 determines the execution status information contained in the management information storage table of a job whose execution status information contained in the management information storage table matches the job status indicated by the execution information contained in the execution information storage table stored in the standby job execution device 3. Details of the operation of the determination unit 421 will be described later. After the operation of the determination unit 421, the execution status information of a job whose execution status information has not been determined includes information indicating that it is the subject of determination by the determination unit 422 ("waiting for determination").

The determination unit 422 determines whether or not to cause the job associated with the execution status information to be executed by the job execution device 3 of the standby system. The determination by the determination unit 422 of whether or not to cause the job to be executed by the job execution device 3 of the standby system will be described later. Furthermore, the execution status information contained in the management information storage table (FIG. 9) of the job to be determined after the above-mentioned determination by the determination unit 422 includes information indicating that the job is to be executed by the job execution device 3 of the standby system, identified by the identification unit 42 ("to be executed"). Furthermore, the start time information stored in the management information management table of the job executed in the job management system 2 of the standby system indicates the time when the job execution device 3 of the standby system started executing the job. Furthermore, the end time information stored in the management information management table of the job executed in the job management system 2 of the standby system indicates the time when the job execution device 3 of the standby system ended executing the job.

The identification unit 42 is described in more detail below.

The determination unit 421 receives the determination time information from the execution information acquisition unit 412. Then, the determination unit 421 performs the following operation based on the execution status information included in the management information storage table stored in the management information storage unit 45 and the execution information included in the acquired execution information storage table stored in the acquired information storage unit 44. The determination unit 421 determines the execution status information included in the management information storage table of the job for which the execution status information in the management information storage table of the management information storage unit 45 matches the job status indicated by the execution information in the execution information storage table of the execution information storage unit 34 of the job execution device 3 of the standby system.

The time indicated by the confirmation time information received by the confirmation unit 421 from the execution information acquisition unit 412 (hereinafter referred to as the confirmation time) indicates the earliest time among the times indicated by the copy time information of the devices included in the job management system 2 of the standby system. Therefore, the deliverables of the job whose execution was completed by the confirmation time, whose end time information indicates the time up to the confirmation time, are stored in the data storage unit 33 of the job execution device 3 of the standby system or in the remote storage included in the job management system 2. In this case, the execution status information ("Complete") of the management information storage table stored in the management information storage unit 45 matches the job status indicated by the execution information ("Complete") of the execution information storage table stored in the execution information storage unit 34 of the job execution device 3 of the standby system. For jobs whose end time information indicates the time up to the confirmation time and whose execution was completed by the confirmation time, the confirmation unit 421 leaves the execution status information of the management information storage table stored in the management information storage unit 45 as "Complete". In addition, because the execution status information in the management information storage table stored in the management information storage unit 45 is "completed," jobs that have been executed by the confirmed time are not subject to judgment by the judgment unit 422, which will be described later.

As described below, the determination unit 421 also identifies the final job, which is the last job to be executed, among jobs for which at least one of the job execution status information included in the management information storage table of the standby system and the acquired execution information indicates that the job has been executed. Note that with respect to jobs executed after jobs that have finished execution by the determination time through to the final job, the job status information indicated in the management information storage table of the job management device 4 of the standby system and the execution information indicated in the execution information storage table of the job execution device 3 of the standby system may not match. Therefore, jobs executed after jobs that have finished execution by the determination time through to the final job are subject to determination by the determination unit 422, which will be described later.

The determination unit 421 can grasp jobs to be executed after the final job based on the previous job information included in the job net definition storage table stored in the job net definition storage unit 46. The determination unit 421 then leaves the execution status information of the management information storage table stored in the management information storage unit 45 for jobs to be executed after the final job as "unexecuted". This is because the job execution device 6 of the active system has not executed jobs to be executed after the final job, and therefore the deliverables of the jobs to be executed after the final job do not exist in the job management system 2 of the standby system. Therefore, the execution status information ("unexecuted") of the management information storage table of the job management device 4 of the standby system for jobs to be executed after the final job matches the job status indicated by the execution information ("unexecuted") of the execution information storage table of the job execution device 3 of the standby system. In addition, since the execution status information of the management information storage table stored in the management information storage unit 45 is "unexecuted", these jobs are not subject to judgment by the judgment unit 422 described later.

The determination unit 421 performs an operation of storing execution status information ("waiting for determination") indicating that a job is a target for determination for a job whose execution status information has not been determined in the management information storage table stored in the management information storage unit 45, and then determining that the execution status information in the management information storage table stored in the management information storage unit 45 is not yet executed for the job whose execution status information has not been determined, after determining that the execution status information in the management information storage table of the standby job management device 4 is "completed" and that the execution status information in the management information storage table of the standby job management device 4 is "not yet executed", for the job whose execution status information has not been determined, storing execution status information indicating that the job is a target for determination in the management information storage table stored in the management information storage unit 45.

In this way, the determination unit 421 determines the job execution status information contained in the management information storage table stored in the management information storage unit 45 of the standby job management device 4, for a job whose execution status information contained in the management information storage table stored in the management information storage unit 45 matches the job status indicated by the execution information in the execution information storage table of the execution information storage unit 34 of the standby job execution device 3.

The determination unit 421 determines that jobs for which the execution status information included in the management information storage table stored in the management information storage unit 45 has not been determined are jobs to be subjected to determination by the determination unit 422, which will be described later.

Specifically, the determination unit 421 extracts job identification information of a job for which at least one of the execution status information in the management information storage table stored in the management information storage unit 45 and the execution information in the acquired execution information storage table stored in the acquired information storage unit 44 indicates that the job has been executed. Then, the determination unit 421 identifies the final job from among the jobs indicated by the extracted job identification information based on the forward job information included in the job net definition storage table stored in the job net definition storage unit 46. The forward job information indicates a job that is executed before the job with which the forward job information is associated. In this embodiment, the forward job information is job identification information of a job that is executed immediately before the job with which the forward job information is associated.

Furthermore, the determination unit 421 sets jobs other than jobs that have been determined to have been executed among the jobs executed before the final job as jobs to be determined by the determination unit 422, which will be described later. Then, for the jobs to be determined, the determination unit 421 stores execution status information indicating that the job is to be determined ("waiting for determination") in the management information storage table stored in the management information storage unit 45. Then, the determination unit 421 performs an operation to determine that the execution status information in the management information storage table stored in the management information storage unit 45, as described above, is "not executed". Furthermore, the determination unit 421 requests the determination unit 422 to determine the job.

The determination unit 422 determines whether or not to cause a job, for which execution status information included in the management information storage table stored in the management information storage unit 45 has not been determined, to be executed by a job execution device 3 in the standby system. The determination unit 422 identifies a job to be executed by a job execution device 3 in the standby system. In this embodiment, the determination unit 422 stores start time information and end time information related to the job to be determined and included in the execution information storage table stored in the execution information storage unit 34 of the job execution device 3 in the standby system in the management information storage table stored in the management information storage unit 45.

A specific operation of the determination unit 422 will be described. When a job determination is requested by the determination unit 421, the determination unit 422 extracts a record including execution status information ("determination target") indicating that the associated job is a job to be determined from the management information storage table stored in the management information storage unit 45. Furthermore, the determination unit 422 determines whether or not to cause the job execution device 3 in the standby system to execute the job related to the extracted record, starting from the job that is later in the execution order (the job that is later), based on the forward job information included in the job net definition storage table (FIG. 10) stored in the job net definition storage unit 46. Assume that the determination unit 422 determines that a certain job is a job that does not need to be executed by the job execution device 3 in the standby system. In that case, even if a job earlier than the job is the target of the determination and has not been executed, there are cases where it is not necessary to execute the unexecuted job earlier than the job to be determined. Therefore, the determination unit 422 performs the determination starting from the job that is later in the execution order.

The determination unit 422 in this embodiment makes the following three determinations. After making the following three determinations, the determination unit 422 requests the control unit 43 to output control information instructing the job to be executed. The determination unit 422 makes determinations in order from (1) to (3). (1) The determination unit 422 determines whether or not a normal deliverable of the job to be determined exists in the job management system 2 of the standby system.
(2) The determination unit 422 determines whether the deliverable of the job to be determined is an intermediate deliverable that is a deliverable that is temporarily present in the job management system 2 of the standby system.
(3) The determination unit 422 determines whether or not the deliverable of the job to be determined is used in the execution of another job that has not yet been executed.

The judgment unit 422 judges whether or not a normal deliverable of the job to be judged exists in the job management system 2 of the standby system (judgment (1)). If a normal deliverable of the job to be judged exists in the job management system 2 of the standby system, the job management device 4 of the standby system does not cause the job execution device 3 of the standby system to execute the job to be judged. Furthermore, if a normal deliverable of the job to be judged does not exist in the job management system 2 of the standby system, the judgment unit 422 further judges whether or not to cause the job execution device 3 of the standby system to execute the job to be judged (judgments (2) and (3)).

The judgments made by the judgment unit 422 will be explained starting from (1).

First, (1) we will explain the case where the judgment unit 422 judges whether or not a normal deliverable of the job to be judged exists in the job management system 2 of the standby system.

The judgment unit 422 causes the execution information output unit 312 of the standby job execution device 3 that executes the job to be judged to output information about the deliverable based on the device identification information in the jobnet definition storage table (FIG. 10) stored in the jobnet definition storage unit 46. The information about the deliverable includes output data identification information, output data format information, and information used for judgment. The output data identification information is information for identifying the deliverable obtained by executing the job. The output data format information indicates the data format of the deliverable obtained by executing the job. The information used for judgment is, for example, the update time of the record updated by the execution of the job if the deliverable is a record, or a hash value calculated in advance by the active job execution device 6 as described below if the deliverable is a file.

The judgment unit 422 judges whether the output data identification information and output data format information included in the information on the deliverable of the job to be judged match the output data identification information and output data format information related to the job to be judged included in the jobnet definition storage table stored in the jobnet definition storage unit 46. Furthermore, the judgment unit 422 judges whether the deliverable of the job to be judged satisfies the condition indicated by the judgment information associated with the job to be judged based on the information on the deliverable of the job to be judged. The judgment information is information indicating the condition for judging whether the deliverable of the job is normal or not. In this way, the judgment unit 422 judges whether a normal deliverable of the job to be judged exists in the job management system 2 of the standby system.

When the determination unit 422 determines that a normal deliverable of the job being determined exists in the job management system 2 of the standby system, the determination unit 422 determines that the job being determined is a job that has already been executed. In addition, the determination unit 422 stores execution status information ("Complete") indicating that the job being determined has already been executed, in the management information storage table stored in the management information storage unit 45.

Next, we will explain (2) the case where the judgment unit 422 judges whether the deliverable of the job being judged is an intermediate deliverable.

When the determination unit 422 determines that a normal deliverable of the job to be determined does not exist in the standby job management system 2, the determination unit 422 performs the next determination (determination (2)). The determination unit 422 determines whether or not the deliverable of the job to be determined is an intermediate deliverable based on the intermediate information included in the jobnet definition storage table stored in the jobnet definition storage unit 46.

The intermediate information indicates the retention period of the job product. The product obtained by executing a job to which "Yes" is associated as intermediate information is a product (e.g., a temporary file) that temporarily exists in the job management system 2 of the standby system. A product that temporarily exists in the job management system 2 of the standby system is called an intermediate product. In addition, an intermediate product does not need to exist in the job management system 2 of the standby system after it has been used to execute a subsequent job. In addition, if all subsequent jobs that use a product determined to be an intermediate product have been executed, even if a normal product determined to be an intermediate product does not exist in the job management system 2 of the standby system, the job execution device 3 of the standby system does not need to execute a job to obtain the product. The product obtained by executing a job to which "No" is associated as intermediate information is a product that needs to exist in the job management system 2 of the standby system even after the execution of a series of related jobs (e.g., jobs included in a jobnet) has ended.

In this embodiment, the series of related jobs are jobs indicated by the job identification information stored in the jobnet definition storage table shown in FIG. 10. When the intermediate information of the job to be determined contained in the jobnet definition storage table (FIG. 10) stored in the jobnet definition storage unit 46 is "Yes", the determination unit 422 determines that the deliverable of the job to be determined is an intermediate deliverable. When the intermediate information of the job to be determined contained in the jobnet definition storage table (FIG. 10) stored in the jobnet definition storage unit 46 is "No", the determination unit 422 determines that the deliverable of the job to be determined is not an intermediate deliverable. When the determination unit 422 determines that the deliverable of the job to be determined is not an intermediate deliverable, the determination unit 422 determines that the job to be determined is a job to be executed. Furthermore, the determination unit 422 stores execution status information ("to be executed") indicating that the job is to be executed for the job to be determined in the management information storage table stored in the management information storage unit 45.

Finally, we will explain (3) the case where it is determined whether the deliverables of the job being evaluated are used in the execution of another job that is not yet executed but will be executed after the job being evaluated.

When the deliverable of the job to be judged is an intermediate deliverable, the judgment unit 422 makes the following judgment. The judgment unit 422 judges whether the deliverable of the job to be judged is used in the execution of another unexecuted job to be executed after the job to be judged. The judgment unit 422 identifies the job identification information of a job that uses input data identification information that matches the output data identification information of the deliverable of the job to be judged, based on the output data identification information and input data identification information included in the job net definition storage table stored in the job net definition storage unit 46. The input data identification information is information for identifying input data used in the execution of a job. Note that, when the deliverable of a job executed earlier is used as input data, the input data identification information is represented by the same identification information as the output data identification information of the deliverable of the job executed earlier. The judgment unit 422 judges whether the job indicated by the identified job identification information is executed after the job to be judged, based on the previous job information included in the job net definition storage table stored in the job net definition storage unit 46. Furthermore, when the execution status information in the management information storage table stored in the management information storage unit 45, which is related to the job indicated by the specified job identification information, is "not executed" or "must be executed", the determination unit 422 determines that the job indicated by the specified job identification information is not being executed. When the job indicated by the specified job identification information is executed after the job being determined and has not been executed, the determination unit 422 determines that the job being determined is a job to be executed. Then, the determination unit 422 stores execution status information indicating that the job is to be executed ("must be executed") for the job being determined in the management information storage table stored in the management information storage unit 45.

Furthermore, if the determination unit 422 determines that the deliverables of the job being determined will not be used in the execution of another job that is not yet executed and will be executed after the job being determined, the determination unit 422 determines that the job being determined is an executed job. Then, the determination unit 422 stores execution status information ("Complete") indicating that the job being determined has been executed, in the management information storage table stored in the management information storage unit 45. When it has determined whether or not to cause the job execution device 3 of the standby system to execute all jobs included in the extracted records, the determination unit 422 of the job management device 4 of the standby system requests the control unit 43 to output control information instructing the job to be executed.

The replication unit 48 is connected to the management information storage unit 45 and the jobnet definition storage unit 46. The replication unit 48 asynchronously replicates, at a predetermined timing, the information contained in the management information storage table stored in the job management device 7 of the active system and the information contained in the jobnet definition storage table.

The replication unit 48 of this embodiment receives information contained in the management information storage table stored in the job management device 7 of the active system from the management information output unit 711 of the job management device 7 of the active system. The replication unit 48 also receives information contained in the job net definition storage table of the job management device 7 of the active system from the job net definition output unit 712 of the job management device 7 of the active system. The replication unit 48 replicates the received information contained in the management information storage table to the management information storage table stored in the management information storage unit 45 of the job management device 4 of the standby system. The replication unit 48 also replicates the received information contained in the job net definition storage table to the job net definition storage table stored in the job net definition storage unit 46. Furthermore, the replication unit 48 stores replication time information indicating the time of replication, device information indicating that the device that performed the replication is the job management device 4 of the standby system, and device identification information of the job management device 4 of the standby system in the time storage table (FIG. 5) of the acquired information storage unit 44.

When replicating the management information storage table of the active job management device 7, the replication unit 48 performs the following operation. The replication unit 48 replaces each of the device identification information of the active job execution device 6 among the information contained in the received management information storage table with the device identification information of the standby job execution device 3 corresponding to the active job execution device 6, and replicates it. The standby job management device 4 may store, in a storage unit (not shown), relationship information indicating which active job management device 7's execution information storage table and deliverable are being replicated by the standby job execution device 3 included in the standby job management system 2.

The jobnet definition storage unit 46 is connected to the identification unit 42 and the replication unit 48. The jobnet definition storage unit 46 stores a jobnet definition storage table. The jobnet definition storage table includes job identification information, previous job information, device identification information of the job execution device 3 of the standby system that executes the job indicated by the job identification information, output data identification information, output data format information, intermediate information, input data identification information, and judgment information. Before the job management device 4 of the standby system receives instruction information instructing switching of the system to the job management system 2 of the standby system, the jobnet definition storage table stored in the jobnet definition storage unit 46 includes information replicated by the replication unit 48.

The following are examples of conditions for determining whether the job deliverable indicated by the determination information is normal or not. Note that the conditions for determination are not limited to the following conditions.
- If the deliverable is a file, the creation date and time (timestamp) of the deliverable is newer than the time indicated by the start time information of the job that created the deliverable.
When the deliverable is a file and the hash value of the deliverable is calculated by the active job execution device 6 at the time of job execution, the hash value of the deliverable stored in the standby job management system 2 matches the hash value calculated by the active job execution device 6. The hash value is calculated using, for example, MD5 (Message Digest 5) or SHA-1 (Secure Hash Algorithm 1).
If the deliverable is a record registered in a database, a record newer than the time indicated by the job start time information exists in the table of the database included in the job management system 2 of the standby system.
If the job is a job for turning on the power of a remote server, a response is received from the remote server within a predetermined time period in response to a ping (Packet Internet Groper) command executed by the determination unit 422 .

Figure 10 shows an example of a jobnet definition storage table stored in the jobnet definition storage unit 46. In the example of Figure 10, job identification information and, for a job indicated by the job identification information, previous job information, device identification information of the job execution device that executes the job, output data identification information of the deliverable of the job, output data format information, intermediate information of the job, input data identification information, and judgment information are stored in the jobnet definition storage table. In the example of Figure 10, information about each of the jobs with job identification information "JOB1", "JOB2", "JOB3-1", "JOB3-2", "JOB4", "JOB5-1", "JOB5-2", and "JOB6" is stored in the jobnet definition storage table.

When the control unit 43 receives a request from the determination unit 422 of the standby job management device 4 to output control information indicating the job to be executed, the control unit 43 performs the following operations.

The control unit 43 outputs control information that instructs the execution of the job identified by the identification unit 42, including the job identification information of the job to be executed. The control unit 43 causes the job execution device 3 of the standby system to execute the job in order from the front job associated with execution status information ("not executed" or "to be executed") indicating a state in which the job is not being executed. The control unit 43 causes the job execution device 3 of the standby system to execute the job in order from the front job based on the front job information included in the job net definition storage table stored in the job net definition storage unit 46. Furthermore, the control unit 43 receives the job identification information of the job that has started execution and the start time information of the job from the job execution device 3 of the standby system. Based on the received job identification information, the control unit 43 stores the start time information of the job and execution status information ("executing") indicating a state in which the job has started execution and has not yet finished execution in the management information storage table of the management information storage unit 45. The control unit 43 also receives job identification information of a job that has been completed and end time information of the job from the standby job execution device 3. Based on the received job identification information, the control unit 43 stores, for a job that has been completed, execution status information ("Complete") indicating that the job has been executed and end time information in the management information storage table of the management information storage unit 45.

Next, an example of the configuration of the active job execution device 6 of this embodiment will be described with reference to FIG. 11. FIG. 11 is a block diagram showing an example of the configuration of the active job management system 5 of this embodiment.

The job execution device 6 includes an output unit 61, an execution unit 62, a data storage unit 63, and an execution information storage unit 64.

The job execution device 6 of the active system differs from the job execution device 3 of the standby system in that the output unit 61 includes a data output unit 611, and does not include a configuration equivalent to the replication unit 35 of the job execution device 3 of the standby system. In this embodiment, the output unit 31 of the job execution device 3 of the standby system may include a configuration equivalent to the data output unit 611 of the job execution device 6 of the active system. Furthermore, the job execution device 6 of this embodiment may include a configuration equivalent to the replication unit 35 of the job execution device 3 of the standby system. In this way, the job execution device 6 of the active system may have a configuration similar to that of the job execution device 3 of the standby system.

The active job execution device 6 also has a function for detecting a failure in the active job management system 5, and when a failure is detected, outputs instruction information to the standby job management device 4 to instruct the system to switch to the standby job management system 2.

The output unit 61 includes a data output unit 611 and an execution information output unit 612.

The data output unit 611 outputs the job results to the standby job execution device 3 at a predetermined timing. In this embodiment, the data output unit 611 outputs the results of the job executed after the previous output of the results. The data output unit 611 may output the job results every time a predetermined time has elapsed.

The execution information output unit 612 outputs information contained in the execution information storage table stored in the execution information memory unit 64 to the standby job execution device 3 at the same timing as the data output unit 611 outputs the job deliverable. In addition, the execution information output unit 612 of this embodiment outputs information contained in the execution information storage table related to jobs executed after the previous output of information contained in the execution information storage table.

The data storage unit 63 stores the results of a job. The data storage unit 63 also stores a database. The results of a job stored in the data storage unit 63 are the results of a job executed by the execution unit 62. Note that the results of a job and the database may be stored in a remote storage (not shown) included in the job management system 5 of the current system, rather than in the data storage unit 63 (local) of the job execution device 6 of the current system.

The execution information storage unit 64 stores an execution information storage table (not shown). The execution information storage table includes job identification information, and execution information, start time information, and end time information for the job indicated by the job identification information. The execution information storage table stored in the execution information storage unit 64 stores information by the execution unit 62.

The execution unit 62 receives control information instructing the job to be executed, including job identification information of the job to be executed, from the job management device 7 of the active system. The execution unit 62 of the active system job execution device 6 stores start time information indicating the time when the execution of the job started and execution information ("executing") in the execution information storage table stored in the execution information storage unit 64. The execution unit 62 also outputs the job identification information of the job that has started to be executed and the start time information of the job to the job management device 7 of the active system. The execution unit 62 executes the job based on the received control information instructing the job to be executed. The execution unit 62 stores the result of the job in the data storage unit 63 or the remote storage included in the job management system 5 of the active system. The execution unit 62 stores end time information indicating the time when the execution of the job ended and execution information ("completed") indicating the state in which the execution of the job ended in the execution information storage table stored in the execution information storage unit 64. In addition, the execution unit 62 outputs the job identification information of the job that has finished execution and the end time information of the job to the job management device 7 of the active system.

Finally, an example configuration of the current job management device 7 in this embodiment will be described with reference to FIG. 11.

The job management device 7 of the active system differs from the job management device 4 of the standby system in that it includes an output unit 71 and does not include configurations equivalent to the acquisition unit 41, identification unit 42, acquired information storage unit 44, reception unit 47, and replication unit 48 of the job management device 4 of the standby system. The job management device 4 of the standby system in this embodiment may include configurations equivalent to the output unit 71 of the job management device 7 of the active system. The job management device 7 of this embodiment may also include configurations equivalent to the acquisition unit 41, identification unit 42, acquired information storage unit 44, reception unit 47, and replication unit 48 of the job management device 4 of the standby system. In this way, the job management device 7 of the active system may have a configuration similar to that of the job management device 4 of the standby system.

The job management device 7 of the active system also has a function of detecting a failure in the job management system 5 of the active system, and when a failure is detected, outputs instruction information to the job management device 4 of the standby system to instruct the system to switch to the job management system 2 of the standby system.

The job management device 7 includes an output unit 71, a control unit 72, a management information storage unit 73, and a job network definition storage unit 74.

The output unit 71 includes a management information output unit 711 and a jobnet definition output unit 712.

The management information output unit 711 outputs information contained in the management information storage table stored in the management information storage unit 73 to the job management device 4 of the standby system at a predetermined timing. The output information contained in the management information storage table is related to jobs that the job management device 7 has caused the job execution device 6 of the active system to execute since it last output the information contained in the management information storage table. The management information output unit 711 may output information contained in the management information storage table stored in the management information storage unit 73 to the job management device 4 every time a predetermined time has elapsed.

The jobnet definition output unit 712 outputs information contained in the jobnet definition storage table stored in the jobnet definition memory unit 74 to the standby job management device 4 at the same timing as the management information output unit 711 outputs information contained in the management information storage table. In this embodiment, the jobnet definition output unit 712 outputs information contained in the jobnet definition storage table that has been changed since the previous output of information contained in the jobnet definition storage table to the job management device 4.

The management information storage unit 73 stores a management information storage table. The management information storage table stored in the management information storage unit 73 includes job identification information, and also includes, for the job indicated by the job identification information, device identification information of the active job execution device 6 that executes the job, execution status information, start time information, and end time information. The execution status information stored in the management information storage unit 73 indicates the status of the job to be executed by the active job execution device 6.

More specifically, the execution status information stored in the management information storage unit 73 includes information indicating that the currently used job execution device 6 has finished executing the job ("Completed"), information indicating that the job execution has not yet started ("Not Executed"), or information indicating that the job execution has started but not yet finished ("In Progress").

The start time information included in the management information storage table stored in the management information storage unit 73 indicates the time when the active job execution device 6 starts executing the job. The end time information included in the management information storage table stored in the management information storage unit 73 indicates the time when the active job execution device 6 ends executing the job.

FIG. 12 shows an example of the management information storage table stored in the management information storage unit 73 in this embodiment. In the example of FIG. 12, for each job whose job identification information is "JOB1", "JOB2", "JOB3-1", "JOB3-2", "JOB4", "JOB5-1", "JOB5-2", and "JOB6", the device identification information of the job execution device 6 that executes the job, execution status information, start time information, and end time information are stored in the management information storage table. FIG. 12 shows an example of the management information storage table stored in the management information storage unit 73 of the active job management device 7 at the time when instruction information instructing the system to switch to the standby job management system 2 is output. The example of the management information storage table shown in FIG. 12 is an example in which the device identification information of each active job execution device 6 is the same as the device identification information of the standby job execution device 3 that duplicates the execution information storage table and deliverables of the active job execution device 6.

Note that FIG. 7 is an example of a management information storage table stored in the management information storage unit 45 of the job management device 4 of the standby system at the same time as the example of the management information storage table stored in the management information storage unit 73 of the job management device 7 of the active system shown in FIG. 12. In FIG. 12, the jobs with job identification information "JOB3-1" to "JOB5-1" shown as "unexecuted" in FIG. 7 have been completed. Also, in FIG. 12, a job with job identification information "JOB5-2" is being executed by the job execution device 6 of the active system. This difference occurs because the information included in the management information storage table stored in the management information storage unit 73 and related to the jobs with job identification information "JOB3-1" to "JOB5-1" has not been replicated to the job management device 4 of the standby system.

The jobnet definition storage unit 74 stores a jobnet definition storage table (not shown). The jobnet definition storage table stored in the jobnet definition storage unit 74 is similar to the jobnet definition storage table stored in the jobnet definition storage unit 46 of the standby job management device 4 shown in FIG. 10, so a description thereof will be omitted.

The control unit 72 outputs control information, including job identification information, instructing the job to be executed to the job execution device 6 of the active system. Furthermore, the control unit 72 receives job identification information of the job that has started execution and start time information of the job from the job execution device 6 of the active system. Based on the received job identification information, the control unit 72 stores the start time information of the job and execution status information ("executing") indicating that the job has started execution but has not yet finished in the management information storage table of the management information storage unit 73.

The control unit 72 causes the job execution device 6 of the active system to execute jobs in order starting from the forward job based on the forward job information included in the job net definition storage table stored in the job net definition storage unit 74. The control unit 72 receives job identification information of a job that has finished execution and end time information of the job from the job execution device 6 of the active system. Based on the received job identification information, the control unit 72 stores execution status information indicating that the job has been executed ("Completed") and end time information for a job that has finished execution in the management information storage table of the management information storage unit 45.

In this way, when a failure occurs in a system including the active job execution device 6, the job management device 4 acquires execution information from the standby job execution device 3 that executes the job. In the standby job execution device 3, the product of the job executed by the active job execution device 6 and the execution information indicating the execution status of the job in the active job execution device 6 are copied before the failure occurs. Furthermore, the job management device 4 determines whether or not to cause the standby job execution device 3 to execute each job based on the management information, which is information for determining whether or not to cause the standby job execution device 3 to execute the job, and the execution information acquired from the standby job execution device 3, and identifies the job that is determined to be executed as the job to be executed by the standby job execution device 3. Furthermore, the job management device 4 causes the standby job execution device 3 to execute the identified job.

In this way, when a failure occurs, the job management device 4 can quickly determine whether or not each job needs to be executed in the standby job execution device 3 based on the management information and the execution information that was copied before the failure occurred. The job management device 4 can then start operating the standby system by utilizing the results of the job executed by the active job execution device 6 that was copied to the standby job execution device 3 before the failure occurred. This makes it possible to quickly restore the system.

The job management device 4 of this embodiment also determines whether or not to have the standby job execution device 3 execute each job based on the management information and the execution information acquired from the standby job execution device 3. Therefore, when the management information includes execution status information, it is possible to reduce the possibility of inconvenience caused by inconsistency between the execution status information and the execution information copied to the standby job execution device 3.

The job management device 4 also determines the job execution status information included in the management information storage table stored in the management information storage unit 45 of the standby job management device 4 for a job whose execution status information included in the management information storage table stored in the management information storage unit 45 matches the job status indicated by the execution information in the execution information storage table of the execution information storage unit 34 of the standby job execution device 3. Furthermore, the job management device 4 determines whether or not to cause the standby job execution device 3 to execute a job for which the execution status information included in the management information storage table stored in the management information storage unit 45 has not been determined. This makes it possible for the standby job management device 4 to not cause the standby job execution device 3 to execute a job that does not need to be executed by the standby job execution device 3. This makes it possible to quickly restore the standby job management system 2 to the state of the active job management system 5 before the occurrence of the failure.

Next, we will explain an example of the operation of the devices included in the standby job management system 2 and the active job management system 5 in this embodiment.

First, an example of the operation of the standby job execution device 3 and the active job execution device 6 until the reception unit 47 of the standby job management device 4 receives instruction information instructing switching to the standby job management system 2 will be described with reference to FIG. 13. FIG. 13 shows an example of the operation of the standby job execution device 3 and the active job execution device 6.

The data output unit 611 of the active job execution device 6 outputs the results of the job executed after the previous output of the results to the standby job execution device 3 at a predetermined timing. Furthermore, at the same timing as the data output unit 611 outputs the results of the job, the execution information output unit 612 of the active job execution device 6 outputs the information contained in the execution information storage table stored in the execution information storage unit 64, which is related to the job executed after the information contained in the previous execution information storage table was output, to the standby job execution device 3 (step S201).

The replication unit 35 of the standby job execution device 3 receives the results of the job executed by the active job execution device 6 and the information included in the execution information storage table of the active job execution device 6. The replication unit 35 replicates the received job results to the data storage unit 33 of the standby job execution device 3 or to a remote storage included in the standby job management system 2. The replication unit 35 also replicates the information included in the received execution information storage table to the execution information storage table stored in the execution information storage unit 34 of the standby job execution device 3 (step S202).

The replication unit 35 stores in the execution information storage unit 34 replication time information indicating the time when the job deliverable and the information contained in the execution information storage table were replicated from the active job execution device 6 (step S203). The time indicated by the replication time information here is the time when the job deliverable and the information contained in the execution information storage table were output from the active job execution device 6. In this embodiment, the data output unit 611 of the active job execution device 6 outputs replication time information indicating the time when the job deliverable was output to the replication unit 35 of the standby job execution device 3. In addition, the replication unit 35 of the standby job execution device 3 stores the received replication time information in the execution information storage unit 34.

Next, an example of the operation of the standby job management device 4 and the active job management device 7 until the reception unit 47 of the standby job management device 4 receives instruction information instructing switching to the standby job management device 2 will be described with reference to FIG. 14. FIG. 14 shows an example of the operation of the active job management device 7 and the standby job management device 4.

The management information output unit 711 of the job management device 7 of the active system outputs information contained in the management information storage table stored in the management information memory unit 73 to the job management device 4 of the standby system at a predetermined timing. The output information contained in the management information storage table relates to jobs that the job management device 7 has caused the job execution device 6 of the active system to execute since the job management device 7 last output the information contained in the management information storage table. Furthermore, at the same timing as the operation of the management information output unit 711 to output the information contained in the management information storage table, the job net definition output unit 712 of the job management device 7 of the active system outputs information contained in the job net definition storage table stored in the job net definition memory unit 74 that has been changed since the information contained in the job net definition storage table was last output to the job management device 4 of the standby system (step S301).

The replication unit 48 of the standby job management device 4 receives from the active job management device 7 the information contained in the management information storage table and the information contained in the jobnet definition storage table stored in the active job management device 7. The replication unit 48 replicates the information contained in the received management information storage table to the management information storage table stored in the management information memory unit 45 of the standby job management device 4. The replication unit 48 also replicates the information contained in the received jobnet definition storage table to the jobnet definition storage table stored in the jobnet definition memory unit 46 (step S302).

The replication unit 48 stores the replication time information indicating the time when the information contained in the management information storage table and the information contained in the jobnet definition storage table were replicated from the active job management device 7, device information indicating that the device that performed the replication is the standby job management device 4, and device identification information of the standby job management device 4 that performed the replication in the time storage table (Figure 5) of the acquired information storage unit 44 (step S303).

The time indicated by the replication time information here is the time when the information contained in the management information storage table and the information contained in the jobnet definition storage table stored in the active job management device 7 are output from the active job management device 7. In this embodiment, the management information output unit 711 of the active job execution device 6 outputs replication time information indicating the time when the information contained in the management information storage table was output to the replication unit 48 of the standby job management device 4. In addition, the replication unit 48 of the standby job management device 4 stores the received replication time information in the time storage table of the acquired information storage unit 44.

Next, an example of the operation of the standby job management system 2 when the reception unit 47 of the standby job management device 4 receives instruction information instructing switching to the standby job management system 2 will be described with reference to FIG. 15. FIG. 15 shows an example of the operation of the standby job management system 2 of the second embodiment of the present invention.

The reception unit 47 of the standby job management device 4 receives instruction information instructing a system switch to the standby job management system 2 (step S401). The reception unit 47 requests the time acquisition unit 411 to acquire the replication time information.

When the time acquisition unit 411 receives a request from the reception unit 47 to acquire the replication time information, it requests the standby job execution device 3 to output the replication time information (step S402).

The time output unit 311 of the standby job execution device 3 outputs the device identification information of the standby job execution device 3 and the replication time information stored in the execution information storage unit 34 (step S403).

The time acquisition unit 411 of the standby job management device 4 receives the device identification information and the copy time information of the standby job execution device 3 from the time output unit 311 of the standby job execution device 3. The time acquisition unit 411 of the standby job management device 4 stores the device information indicating that the received information is the information of the standby job execution device 3, and the received device identification information and the copy time information of the standby job execution device 3 in the time storage table (FIG. 5) stored in the acquired information storage unit 44 (step S404). The time acquisition unit 411 stores the copy time information of all the job execution devices 3 included in the standby job management system 2 in the time storage table of the acquired information storage unit 44 of the standby job management device 4. Then, the time acquisition unit 411 outputs the confirmed time information indicating the confirmed time that is the oldest time among the copies of the time information stored in the time storage table of the acquired information storage unit 44 to the execution information acquisition unit 412. In the example of the time storage table shown in FIG. 5, the confirmed time information is "9:05", which is indicated by the replicated time information of the job execution device 3, whose device identification information is "AG1".

The execution information acquisition unit 412 receives the confirmed time information from the time acquisition unit 411. The execution information acquisition unit 412 outputs the confirmed time information to the execution information output unit 312 of the standby job execution device 3. The execution information acquisition unit 412 requests the execution information output unit 312 of the standby job execution device 3 to output information contained in the execution information storage table that is related to the job that satisfies the execution information output condition (step S405).

The execution information output unit 312 of the job execution device 3 of the standby system receives the confirmed time information from the execution information acquisition unit 412 of the job management device 4 of the standby system. The execution information output unit 312 of the job execution device 3 of the standby system is also requested by the execution information acquisition unit 412 of the job management device 4 of the standby system to output information contained in the execution information storage table related to the job that satisfies the execution information output condition. The execution information output unit 312 of the job execution device 3 of the standby system outputs the device identification information of the job execution device 3 of the standby system and information contained in the execution information storage table stored in the execution information storage unit 34 related to the job that satisfies the execution information output condition (step S406).

The execution information acquisition unit 412 of the standby job management device 4 receives the device identification information of the standby job execution device 3, and the job identification information, execution information, start time information, and end time information related to the job that satisfies the execution information output condition from the execution information output unit 312 of the standby job execution device 3. The execution information acquisition unit 412 of the standby job management device 4 stores the information received from the execution information output unit 312 of the standby job execution device 3 in the acquired execution information storage table (FIG. 6) stored in the acquired information storage unit 44 (step S407). The execution information acquisition unit 412 stores the information included in the execution information storage table of all job execution devices 3 included in the standby job management system 2 in the acquired execution information storage table stored in the acquired information storage unit 44 of the standby job management device 4. Then, the execution information acquisition unit 412 outputs the confirmed time information to the confirmation unit 421.

For example, when the execution information acquisition unit 412 requests output of information contained in the execution information storage table related to a job that satisfies the execution information output condition, the following information is stored in the execution information storage table of the standby job execution device 3 whose device identification information is "AG1". For a job whose job identification information is "JOB2", the execution information is "In progress", the job start time information is "9:03", and no end time information is stored. If the confirmed time information is "9:05", for the job whose job identification information is "JOB2", the execution information indicates that the job is in a running state, and no end time information is stored, so this job satisfies the execution information output condition. In this case, the execution information acquisition unit 412 of the standby job management device 4 receives the device identification information of the standby job execution device 3 ("AG1"), the job identification information of this job ("JOB2"), the execution information related to this job ("Executing"), the start time information ("9:03"), and the end time information (information indicating no data) from the standby job execution device 3 whose device identification information is "AG1". In this case, the execution information acquisition unit 412 of the standby job management device 4 stores information related to the job whose job identification information is "JOB2" in the record in the first row of the acquired execution information storage table shown in FIG. 6.

The determination unit 421 receives the determination time information from the execution information acquisition unit 412. The determination unit 421 performs the following operation based on the execution status information included in the management information storage table stored in the management information storage unit 45 and the execution information included in the acquired execution information storage table stored in the acquired information storage unit 44. Details of the operation of the determination unit 421 will be described later with reference to FIG. 16. The determination unit 421 determines the execution status information included in the management information storage table stored in the management information storage unit 45 of a job whose execution status information in the management information storage table of the management information storage unit 45 matches the job status indicated by the execution information in the execution information storage table of the execution information storage unit 34 of the job execution device 3 of the standby system. In addition, the determination unit 421 sets a job whose execution status information included in the management information storage table stored in the management information storage unit 45 has not been determined as a job to be determined by the determination unit 422 described later. Furthermore, the determination unit 421 requests the determination unit 422 to determine the job.

The determination unit 422 determines whether or not to cause a job, for which execution status information included in the management information storage table stored in the management information storage unit 45 has not been determined, to be executed by a job execution device 3 in the standby system. Details of the operation of the determination unit 422 will be described later with reference to FIG. 17. The determination unit 422 identifies a job to be executed by a job execution device 3 in the standby system (step S408). Furthermore, the determination unit 422 requests the control unit 43 to output control information instructing the job to be executed.

The control unit 43 outputs control information that instructs the execution of the job identified by the identification unit 42, including job identification information of the job to be executed (step S409).

The execution unit 32 of the job execution device 3 of the standby system receives control information instructing the job to be executed, including job identification information of the job to be executed, from the job management device 4 of the standby system. The execution unit 32 of the job execution device 3 of the standby system stores start time information indicating the time when execution of the job started and execution information ("executing") in the execution information storage table stored in the execution information memory unit 34. The execution unit 32 outputs the job identification information of the job that has started execution and the start time information of the job to the job management device 4 of the standby system (step S410).

The control unit 43 of the standby job management device 4 receives the job identification information of the job that has started execution and the start time information of the job from the standby job execution device 3. Based on the received job identification information, the control unit 43 stores the start time information of the job and the execution status information ("executing") in the management information storage table of the management information storage unit 45.

The execution unit 32 of the standby job execution device 3 stores the job results in the data storage unit 33 or in a remote storage included in the standby job management system 2. The execution unit 32 stores the end time information indicating the time when the job execution was completed and the execution information indicating the state in which the job execution was completed ("Completed") in the execution information storage table stored in the execution information storage unit 34. The execution unit 32 of the standby job execution device 3 outputs the job identification information of the job that has been completed and the end time information of the job to the standby job management device 4 (step S411).

The control unit 43 of the standby job management device 4 receives the job identification information of the job that has finished execution and the end time information of the job from the standby job execution device 3. Based on the received job identification information, the control unit 43 stores the execution status information ("Completed") indicating that the job has been executed and the end time information for the job that has finished execution in the management information storage table of the management information storage unit 45 (step S412).

The control unit 43 causes the job execution device 3 of the standby system to execute the job identified by the identification unit 42 as the job to be executed. After that, the control unit 43 causes the job execution device 3 of the standby system to execute the job that was not executed in the job management system 2 of the active system before the failure occurred. In this way, the job management device 4 starts the operation of the job management system 2 of the standby system.

Next, an example of the operation of the determination unit 42 of the standby job management device 4 included in the standby job management system 2 will be described with reference to Figures 16 and 18. Figures 16 and 18 show an example of the operation of the standby job management device 4. Figure 16 shows an example of the operation of the determination unit 421 of the standby job management device 4. Figure 18 shows an example of the operation of the determination unit 422 of the standby job management device 4. The operations in Figures 16 and 18 also provide a detailed description of the operation of step S408 in Figure 15.

The standby job management device 4 and the standby job execution device 3 perform a series of operations from step 401 to step 407 in the operation example (FIG. 15) of the standby job management device 2 of the second embodiment. After that, the standby job management device 4 of this embodiment performs the operation of step S408 in FIG. 15 (the operation described in detail in FIG. 16 and FIG. 18).

First, an example of the operation of the determination unit 421 included in the identification unit 42 of the job management device 4 in the standby system will be described with reference to FIG. 16.

The determination unit 421 receives the determination time information from the execution information acquisition unit 412. The determination unit 421 leaves the execution status information in the management information storage table stored in the management information storage unit 45 related to the job whose execution was completed by the determination time and whose end time information indicates the time up to the determination time as "completed". The determination unit 421 determines the execution status information included in the management information storage table stored in the management information storage unit 45 for the job whose execution status information included in the management information storage table stored in the management information storage unit 45 matches the job status indicated by the execution information storage unit 34 of the standby job execution device 3 in indicating that the job has been executed (step S501).

For example, if the confirmation time is 9:05, in the example management information storage table of Figure 7, the confirmation unit 421 leaves the execution status information in the management information storage table of the job whose execution status information is "Completed" and whose job identification information is "JOB1" and whose end time information indicates a time before 9:05 as "Completed."

The determination unit 421 extracts job identification information for which at least one of the execution status information in the management information storage table stored in the management information storage unit 45 and the execution information included in the acquired execution information storage table stored in the acquired information storage unit 44 indicates that the job has been executed. Then, based on the previous job information included in the job net definition storage table stored in the job net definition storage unit 46, the determination unit 421 identifies the final job, which is the job to be executed last by the standby job execution device 3, from among the jobs indicated by the extracted job identification information (step S502).

The determination unit 421 determines, among the jobs executed before the final job, the jobs other than the jobs that have been confirmed as having been executed as jobs to be subjected to determination by the determination unit 422 described below (step S503).

Figure 17 is a schematic diagram showing the job execution order contained in the acquisition execution information storage table shown in Figure 6, the management information storage tables shown in Figures 7 to 9 and 12, and the job net definition storage table shown in Figure 10. The arrows connecting the jobs represent the job execution order. Specifically, when the job at the start point of the arrow is completed, the job at the end point of the arrow is executed next. Branched arrows indicate jobs executed in parallel. In the example of Figure 17, a job with job identification information "JOB3-1" and a job with job identification information "JOB3-2" are executed in parallel. Also, a job with job identification information "JOB5-1" and a job with job identification information "JOB5-2" are executed in parallel.

For example, if the confirmed time information is "9:05", the management information storage table is the management information storage table shown in FIG. 7, and the acquisition execution information storage table is the example of the acquisition execution information storage table shown in FIG. 6, the confirmation unit 421 determines the job with job identification information "JOB5-1" to be the final job. The confirmation unit 421 also determines the jobs with job identification information "JOB2", "JOB3-1", "JOB3-2", and "JOB5-1" to be targets for determination by the determination unit 422, which will be described later.

For the job that is the subject of judgment, the determination unit 421 stores execution status information indicating that the job is the subject of judgment ("waiting for judgment") in the management information storage table stored in the management information storage unit 45.

For example, assume that jobs with job identification information "JOB2" to "JOB5-1" are to be judged by the judging unit 422, which will be described later. When the determining unit 421 stores execution status information indicating that the job is to be judged ("waiting for judgment") in the management information storage table stored in the management information storage unit 45, "waiting for judgment" is stored in the execution status information of the records in the second to sixth rows of the management information storage table shown in FIG. 8 in the management information storage table stored in the management information storage unit 45. Note that the determining unit 421 may store the start time information and end time information stored in the acquired execution information storage table of the acquired information storage unit 44 for jobs for which the start time information and end time information are not stored in the standby system management information storage table. Note that the start time information ("?") and end time information ("?") in the fifth row of the management information storage table shown in FIG. 8 indicate that the start time information and end time information are not stored in the acquired execution information storage table of the acquired information storage unit 44.

The determination unit 421 leaves the execution status information in the management information storage table stored in the management information storage unit 45, which is related to jobs executed after the final job, as "unexecuted." The determination unit 421 determines the execution status information included in the management information storage table stored in the management information storage unit 45 for jobs whose execution status information included in the management information storage table stored in the management information storage unit 45 matches the job status indicated by the execution information storage unit 34 of the job execution device 3 in the standby system by indicating that the job is in an unexecuted state (step S504). Furthermore, the determination unit 421 requests the determination unit 422 to determine the job.

Next, an example of the operation of the determination unit 422 included in the identification unit 42 of the job management device 4 of the standby system will be described with reference to FIG. 18. FIG. 18 shows an example of the operation of the job management device 4 of the standby system.

After the determination unit 421 of the standby job management device 4 performs a series of operations from step S501 to step S504 in the operation example of the determination unit 421 of the standby job management device 4 (FIG. 16), the determination unit 422 of the standby job management device 4 of this embodiment performs the operation shown in FIG. 18.

When a request for job judgment is received from the determination unit 421, the judgment unit 422 extracts a record from the management information storage table stored in the management information storage unit 45 that contains execution status information ("Judgement target") indicating that the associated job is the subject of judgment (step S601).

The determination unit 422 determines whether or not to cause the job execution device 3 in the standby system to execute the job related to the extracted record, starting from the subsequent job, based on the forward job information included in the job net definition storage table (FIG. 10) stored in the job net definition storage unit 46. The determination unit 422 identifies the job that is furthest back in the execution order among the jobs to be determined (step S602).

The judgment unit 422 first subjects the job identified in step S602 to the judgment performed in steps S603 to S607. The judgment unit 422 identifies the standby job execution device 3 that executes the job to be judged based on the device identification information in the job net definition storage table stored in the job net definition storage unit 46. Then, the judgment unit 422 causes the execution information output unit 312 of the identified job execution device 3 to output information about the deliverable. The judgment unit 422 judges whether the output data identification information and output data format information included in the information about the deliverable of the job to be judged match the output data identification information and output data format information related to the job to be judged included in the job net definition storage table stored in the job net definition storage unit 46. Furthermore, the judgment unit 422 judges whether the deliverable of the job to be judged satisfies the condition indicated by the judgment information associated with the job to be judged based on the information about the deliverable of the job to be judged (the judgment of (1) described above). In this way, the judgment unit 422 judges whether or not a normal deliverable of the job being judged exists in the job management system 2 of the standby system (step S603).

If a normal deliverable of the job being judged exists in the job management system 2 of the standby system (step S603, YES), the judgment unit 422 determines that the job being judged is a job that has already been executed (step S607). The judgment unit 422 stores execution status information ("Complete") indicating that the job being judged has already been executed, for the job being judged, in the management information storage table stored in the management information storage unit 45. In this case, the judgment unit 422 does not perform the operations from step S604 to step S606 described below.

For example, suppose that the judgment unit 422 judges the deliverable of a job whose job identification information is "JOB4". In the jobnet definition storage table shown in FIG. 10, "file exists" is stored as the judgment information of the job whose job identification information is "JOB4". The judgment unit 422 judges whether or not a deliverable whose output data identification information is "File4" and whose output data format information is "remote file" exists in the job management system 2 of the standby system based on the information on the deliverable output from the job execution device 3 of the standby system whose device identification information is "AG1". Since the judgment information is "file exists", if the information on the deliverable includes information on a deliverable whose output data identification information is "File4" and whose output data format information is "remote file", the judgment unit 422 judges that a normal deliverable of the job to be judged exists in the job management system 2 of the standby system. If the determination unit 422 determines that a normal deliverable of the job being determined exists in the job management system 2 of the standby system, the determination unit 422 stores "Completed" in the execution status information of the record in the fifth row of the management information storage table shown in FIG. 9.

When the determination unit 422 determines that a normal deliverable of the job to be determined does not exist in the standby job management system 2 (step S603, NO), the determination unit 422 performs the following operation. The determination unit 422 determines whether the deliverable of the job to be determined is an intermediate deliverable based on the intermediate information included in the jobnet definition storage table stored in the jobnet definition storage unit 46 (the determination of (2) described above) (step S604).

When the determination unit 422 determines that the deliverable of the job being determined is not an intermediate deliverable (step S604, NO), the determination unit 422 determines that the job being determined is a job to be executed (step S606). In addition, the determination unit 422 stores execution status information indicating that the job being determined is to be executed ("to be executed") in the management information storage table stored in the management information storage unit 45 for the job being determined. In this case, the determination unit 422 does not perform the operations of steps S605 and S607 described below.

For example, suppose that the determination unit 422 determines the result of a job whose job identification information is "JOB3-2". Suppose that a result whose output data identification information is "File3" and whose output data format information is "local file" is not stored in the data storage unit 33 of the standby job execution device 3 whose device identification information is "AG3". Furthermore, in the jobnet definition storage table shown in FIG. 10, "No" is stored as intermediate information for the job whose job identification information is "JOB3-2". In this case, since the result of the job whose job identification information is "JOB3-2" is not an intermediate result, the determination unit 422 stores "Execution required" in the execution status information of the record in the fourth row of the management information storage table shown in FIG. 9.

When the determination unit 422 determines that the deliverable of the job being determined is an intermediate deliverable (step S604, YES), the determination unit 422 determines whether the deliverable of the job being determined is used in the execution of another job that is not yet executed and that is executed after the job being determined (determination of (3) above) (step S605).

When the determination unit 422 determines that the deliverable of the job being determined is a job to be used in the execution of another job that is not yet executed and will be executed after the job being determined (step S605, YES), the determination unit 422 determines that the job being determined is a job that causes the job being determined to be executed (step S606). Then, the determination unit 422 stores execution status information indicating that the job being determined is to be executed ("must be executed") in the management information storage table stored in the management information storage unit 45 for the job being determined. Furthermore, the determination unit 422 does not perform the operation of step S607.

For example, suppose that the determination unit 422 determines the deliverable of a job whose job identification information is "JOB5-1". Suppose that the deliverable whose output data identification information is "Record2" and whose output data format is "DB record" is not stored in the data storage unit 33 of the standby job execution device 3 or in the database stored in the remote storage included in the job management system 2. Also, in the job net definition storage table shown in FIG. 10, "Yes" is stored as intermediate information of the job whose job identification information is "JOB5-1". In this case, since the deliverable of the job whose job identification information is "JOB5-1" is an intermediate deliverable, the determination unit 422 determines whether or not it is used in the execution of another job that is executed after the job to be determined and is not executed. In the job net definition storage table shown in FIG. 10, "Record2" is stored as input data identification information of the job whose job identification information is "JOB6". In this case, the product of the job with job identification information "JOB5-1" is used in the execution of the job with job identification information "JOB6". Also, as shown in the previous job information ("JOB5-1") of the job with job identification information "JOB6" in the job net definition storage table shown in FIG. 10 and in FIG. 17, the job with job identification information "JOB6" is executed after the job with job identification information "JOB5-1". Here, in the example of the management information storage table in FIG. 9, the job with job identification information "JOB6" has not been executed, so the determination unit 422 stores "to be executed" in the execution status information of the record in the sixth row of the management information storage table shown in FIG. 9.

When the determination unit 422 determines that the deliverables of the job being determined will not be used in the execution of another job that is not yet executed and will be executed after the job being determined (step S605, NO), the determination unit 422 performs the following operation. For the job being determined, the determination unit 422 stores execution status information indicating that the job has been executed ("Completed") in the management information storage table stored in the management information storage unit 45 (step S607). In this case, the determination unit 422 does not perform the operation of step S606.

For example, suppose that the judgment unit 422 judges the result of a job whose job identification information is "JOB2". Suppose that a result whose output data identification information is "File2" and whose output data format information is "remote file" does not exist in the job management system 2 of the standby system. Furthermore, in the jobnet definition storage table shown in FIG. 10, "Yes" is stored as intermediate information of a job whose job identification information is "JOB2". Furthermore, in the example of the jobnet definition storage table shown in FIG. 10, "File2" is stored as input data identification information of a job whose job identification information is "JOB3-1". The result of a job whose job identification information is "JOB2" is an intermediate result. Furthermore, the result of a job whose job identification information is "JOB2" is used in the execution of a job whose job identification information is "JOB3-1". Also, as shown in the previous job information ("JOB2") of the job with job identification information "JOB3-1" in the job net definition storage table shown in FIG. 10 and in FIG. 17, the job with job identification information "JOB3-1" is executed after the job with job identification information "JOB2". Here, in the example of the management information storage table in FIG. 9, the job with job identification information "JOB3-1" has already been executed, so the determination unit 422 stores "Completed" in the execution status information of the record in the second row of the management information storage table shown in FIG. 9.

After the operation of step S606 or step S607, the judgment unit 422 checks whether or not it has been determined for all jobs to be judged whether they should be executed by the job execution device 3 of the standby system (step S608). All jobs to be judged here are the jobs whose records were extracted in step S601. If it has not been determined for all jobs to be judged whether or not they should be executed by the job execution device 3 of the standby system (step S608, NO), the judgment unit 422 performs the following operation. The judgment unit 422 performs the operation of steps S603 to S608 for jobs whose records were extracted in step S601 and for which it has not been determined whether or not they should be executed by the job execution device 3 of the standby system. If it has been determined for all jobs to be judged whether or not they should be executed by the job execution device 3 of the standby system (step S608, YES), the judgment unit 422 of the job management device 4 of the standby system requests the control unit 43 to output control information instructing the job to be executed. In this embodiment, each time the determination unit 422 makes a determination on a job to be determined, the determination unit 422 reflects the determination result in the management information storage table. The determination unit 422 may reflect the determination result in the management information storage table after making a determination on all jobs to be determined.

As described above, in the second embodiment of the present invention, the job management device 4 acquires execution information from the standby job execution device 3 that executes a job when a failure occurs in a system including the active job execution device 6. In the standby job execution device 3, the product of the job executed by the active job execution device 6 and the execution information indicating the execution status of the job in the active job execution device 6 are copied before the failure occurs. In addition, the job management device 4 determines whether or not to cause the standby job execution device 3 to execute each job based on the management information, which is information for determining whether or not to cause the standby job execution device to execute the job, and the execution information acquired from the standby job execution device 3, and identifies the job that is determined to be executed as the job to be executed by the standby job execution device 3. In addition, the job management device 4 causes the standby job execution device 3 to execute the identified job.

In this way, when a failure occurs, the job management device 4 can quickly determine whether or not each job needs to be executed in the standby job execution device 3 based on the management information and the execution information that was copied before the failure occurred. The job management device 4 can then start operating the standby system based on the updated management information, utilizing the results of the job executed by the active job execution device 6 that was copied to the standby job execution device 3 before the failure occurred. This makes it possible to quickly restore the system.

The job management device 4 of this embodiment also determines whether or not to have the standby job execution device 3 execute each job based on the management information and the execution information acquired from the standby job execution device 3. Therefore, when the management information includes execution status information, it is possible to reduce the possibility of inconvenience caused by inconsistency between the execution status information and the execution information copied to the standby job execution device 3.

The job management device 4 of the standby system also determines the job execution status information included in the management information storage table stored in the management information storage unit 45 of a job in which the job status indicated by the execution information in the execution information storage table of the execution information storage unit 34 of the job execution device 3 of the standby system and the execution status information included in the management information storage table stored in the management information storage unit 45 of the job management device 4 of the standby system match in that they indicate that the job execution has ended or that the job execution has not started. Furthermore, the job management device 4 determines whether or not to have the job execution device 3 of the standby system execute a job for which the execution status information included in the management information storage table stored in the management information storage unit 45 has not been determined. This makes it possible for the job management device 4 of the standby system not to have the job execution device 3 of the standby system execute a job that does not need to be executed by the job execution device 3 of the standby system. This makes it possible to quickly restore the job management system 2 of the standby system to the state of the job management system 5 of the active system before the occurrence of the failure.

The standby job management device 4 also causes the standby job execution device 3 to execute jobs that need to be executed in the standby job management system 2 without operator intervention. The control unit 43 then causes the standby job execution device 3 to execute jobs that were not being executed in the active job management system 2 before the failure occurred. In this way, the job management device 4 starts operation of the standby job management system 2. Furthermore, if a failure occurs in the active job management system 5 that is in operation, the standby job management system 2 can automatically recover the system, making it possible to shorten the time it takes to recover the system and prevent human operation errors.

[Hardware configuration example]
An example of the configuration of hardware resources for implementing the job management device (1, 4, or 7) or job execution device (3 or 6) in each of the above-mentioned embodiments of the present invention using one information processing device (computer) will be described below. Note that the job management device or job execution device may be implemented physically or functionally using at least two information processing devices. Furthermore, the job management device or job execution device 3 may be implemented as a dedicated device. Furthermore, only some of the functions of the job management device or job execution device may be implemented using an information processing device.

Figure 19 is a diagram showing an outline of an example of the hardware configuration of an information processing device capable of realizing a job management device or a job execution device according to each embodiment of the present invention. The information processing device 8 includes a communication interface 81, an input/output interface 82, a computing device 83, a storage device 84, a non-volatile storage device 85, and a drive device 86.

For example, the acquisition unit 11, the identification unit 12, and the control unit 13 in FIG. 1 can be realized by the calculation device 83.

The communication interface 81 is a communication means for the job management device or job execution device of each embodiment to communicate with an external device via a wired or/and wireless connection. When the job management device or job execution device is realized using at least two information processing devices, the devices may be connected so as to be able to communicate with each other via the communication interface 81.

The input/output interface 82 is a man-machine interface including a keyboard as an example of an input device and a display as an output device.

The arithmetic unit 83 is realized by a general-purpose CPU (Central Processing Unit) or a processing device such as a microprocessor, and a plurality of electric circuits. The arithmetic unit 83 is capable of, for example, reading various programs stored in the non-volatile storage device 85 into the storage device 84 and executing processing according to the read programs.

The storage device 84 is a memory device such as a RAM (Random Access Memory) that can be referenced by the computing device 83, and stores programs, various data, etc. The storage device 84 may be a volatile memory device.

The non-volatile storage device 85 is, for example, a non-volatile storage device such as a ROM (Read Only Memory) or a flash memory, and is capable of storing various programs, data, etc.

The drive device 86 is, for example, a device that processes the reading and writing of data from and to the recording medium 87 described below.

The recording medium 87 is any recording medium capable of recording data, such as an optical disk, a magneto-optical disk, or a semiconductor flash memory.

Each embodiment of the present invention may be realized, for example, by configuring a job management device or a job execution device using the information processing device 8 illustrated in FIG. 19, and supplying a program capable of realizing the functions described in each of the above embodiments to this job management device or job execution device.

In this case, the embodiment can be realized by having the computing device 83 execute a program supplied to the job management device or the job execution device. It is also possible for some, but not all, of the functions of the job management device or the job execution device to be configured by the information processing device 8.

Furthermore, the above program may be recorded on a recording medium 87, and may be configured to be stored in the non-volatile storage device 85 as appropriate at the shipping stage or operation stage of the job management device or job execution device. In this case, the method of supplying the above program may be a method of installing the program in the job management device or job execution device using an appropriate tool at the manufacturing stage before shipping or operation stage. The method of supplying the above program may also be a general procedure such as downloading the program from an external source via a communication line such as the Internet.

The above-described embodiments are preferred embodiments of the present invention, and various modifications can be made without departing from the spirit of the present invention.

Some or all of the above embodiments may be described as follows, but are not limited to the following:

(Appendix 1)
an acquisition unit that acquires, when a failure occurs, a product of a job executed by an active job execution device that executes a job and execution information indicating a state of execution of the job by the active job execution device from a standby job execution device to which the execution information has been copied before the failure occurred in a system including the active job execution device;
a determination unit that determines whether or not to cause the job to be executed by the job execution device of the standby system based on management information, which is information for determining whether or not to cause the job to be executed by the job execution device of the standby system, and the acquired execution information, and that determines that the job to be executed is a job to be executed by the job execution device of the standby system;
a control unit for causing the job execution device of the standby system to execute the specified job,
Job management device.

(Appendix 2)
the management information includes execution status information, which is information indicating a status of a job to be executed by the job execution device of the standby system, and which is copied from a job management device of an active system included in a system including the job execution device of the active system before the occurrence of the failure,
The job management device described in Appendix 1, characterized in that the identification unit determines whether or not to cause the standby job execution device to execute a job for which the execution status information and the acquired execution information are inconsistent, based on the execution status information and the acquired execution information.

(Appendix 3)
The job management device according to claim 2, characterized in that the identification unit determines, based on confirmed time information indicating the oldest time among the times when the deliverable and the execution information were copied from the job execution device of the active system and the time when the management information was copied from the job management device of the active system, the execution status information, and the acquired execution information, whether or not to cause the job execution device of the standby system to execute a job that was executed after a job for which, in the execution status information, information indicating that the job execution was completed by the time indicated by the confirmed time information is associated, and which is associated in at least one of the execution status information and the acquired execution information with information indicating that the job has been executed, before a final job that is executed last.

(Appendix 4)
The job management device according to any one of Supplementary Note 1 to Supplementary Note 3, characterized in that for a job to be judged, it is determined whether or not a normal product of the job exists in the job execution device in the standby system or a specified storage device, and if a normal product exists, it is determined that a job that obtains the product for which it is determined that a normal product exists is a job that should not be executed by the job execution device in the standby system.

(Appendix 5)
The job management device according to claim 4, further determining whether the deliverable determined to not have a normal deliverable is an intermediate deliverable temporarily present in the job execution device of the standby system or a specified storage device, and if the deliverable is not the intermediate deliverable, determining that a job for obtaining the deliverable that is not the intermediate deliverable is a job to be executed by the job execution device of the standby system.

(Appendix 6)
The job management device described in Appendix 5 is characterized in that it further determines whether the product determined to be the intermediate product will be used in the execution of a job that is executed after the job that obtains the product and that is not yet executed, and if the product is used in the execution of a job that is executed after the job that obtains the product and that is not yet executed, it determines the job to obtain the product as a job to be executed by the job execution device in the standby system.

(Appendix 7)
A job management device according to any one of claims 1 to 6,
the job execution device of the standby system;
A job management system comprising:

(Appendix 8)
When a failure occurs in a system including the job execution device of the active system, a product of the job executed by the job execution device of the active system that executes the job and execution information indicating the status of the job execution of the job execution device of the active system are acquired from a job execution device of the standby system to which the execution information has been copied before the failure occurs in the system including the job execution device of the active system;
determining whether or not to cause the job to be executed by the job execution device of the standby system based on management information, which is information for determining whether or not to cause the job to be executed by the job execution device of the standby system, and the acquired execution information, and identifying the job determined to be executed as the job to be executed by the job execution device of the standby system;
causing the job execution device of the standby system to execute the identified job;
Job management methods.

(Appendix 9)
the management information includes execution status information, which is information indicating a status of a job to be executed by the job execution device of the standby system, and which is copied from a job management device of an active system included in a system including the job execution device of the active system before the occurrence of the failure,
The job management method according to claim 8, further comprising: determining whether or not to cause the job execution device in the standby system to execute a job for which the execution status information and the acquired execution information are inconsistent, based on the execution status information and the acquired execution information.

(Appendix 10)
and determining whether or not to cause the standby job execution device to execute a job that is executed after a job for which information indicating that the job execution was completed by the time indicated by the determined time information is associated in the execution status information, and which is associated in at least one of the execution status information and the execution information, the determined time information indicating the earliest time among the times when the deliverable and the execution information were copied from the active job execution device and the management information was copied from the active job management device, the execution status information, and the acquired execution information, the job management method according to claim 9, characterized in that it determines whether or not to cause the standby job execution device to execute a job that is executed before a final job that is executed last, the job being executed after a job for which information indicating that the job execution was completed by the time indicated by the determined time information is associated in the execution status information, and which is associated in at least one of the execution status information and the acquired execution information, the job being executed.

(Appendix 11)
A job management method as described in any one of Supplementary Note 8 to Supplementary Note 10, characterized in that for a job to be judged, it is judged whether or not a normal product of the job exists in the job execution device of the standby system or a specified storage device, and if the normal product exists, the job that obtains the product for which it is judged that the normal product exists is judged to be a job that should not be executed by the job execution device of the standby system.

(Appendix 12)
The job management method according to claim 11, further determining whether the deliverable for which it is determined that there is no normal deliverable is an intermediate deliverable temporarily present in the job execution device of the standby system or a specified storage device, and if the deliverable is not the intermediate deliverable, determining that a job for obtaining the deliverable that is not the intermediate deliverable is a job to be executed by the job execution device of the standby system.

(Appendix 13)
The job management method described in Appendix 12, further determining whether the product determined to be the intermediate product will be used in the execution of a job that is executed after the job that obtains the product and that is not yet executed, and if the product will be used in the execution of a job that is executed after the job that obtains the product and that is not yet executed, determining that the job that obtains the product is a job to be executed by the job execution device in the standby system.

(Appendix 14)
On the computer,
an acquisition function for acquiring execution information indicating a result of a job executed by an active job execution device that executes a job and a status of execution of the job by the active job execution device from a standby job execution device to which the execution information has been copied before a failure occurs in a system including the active job execution device, when the failure occurs;
a determination function for determining whether or not to cause the job to be executed by the job execution device of the standby system based on management information, which is information for determining whether or not to cause the job to be executed by the job execution device of the standby system, and the acquired execution information, and for specifying the job determined to be executed as the job to be executed by the job execution device of the standby system;
a job management program for implementing a control function for causing the job execution device of the standby system to execute the identified job.

(Appendix 15)
the management information includes execution status information, which is information indicating a status of a job to be executed by the job execution device of the standby system, and which is copied from a job management device of an active system included in a system including the job execution device of the active system before the occurrence of the failure,
The job management program described in Appendix 14, characterized in that the specific function determines whether or not to cause the standby job execution device to execute a job for which the execution status information and the acquired execution information are inconsistent, based on the execution status information and the acquired execution information.

(Appendix 16)
The job management program according to claim 15, characterized in that the specific function determines, based on confirmed time information indicating the oldest time among the times when the deliverable and the execution information were copied from the job execution device of the active system and the times when the management information was copied from the job management device of the active system, the execution status information, and the acquired execution information, whether or not to cause the job execution device of the standby system to execute a job that was executed after a job for which, in the execution status information, information indicating that the job execution was completed by the time indicated by the confirmed time information is associated, and which is associated in at least one of the execution status information and the acquired execution information with information indicating that the job has been executed, before a final job that is executed last.

(Appendix 17)
A job management program as described in any one of Supplementary Note 14 to Supplementary Note 16, characterized in that for a job to be judged, it is determined whether or not a normal product of the job exists in the job execution device of the standby system or a specified storage device, and if a normal product exists, the job that obtains the product for which it is determined that a normal product exists is determined to be a job that should not be executed by the job execution device of the standby system.

(Appendix 18)
The job management program described in Appendix 17, further determining whether the deliverable for which it is determined that there is no normal deliverable is an intermediate deliverable temporarily present in the job execution device of the standby system or a specified storage device, and if the deliverable is not the intermediate deliverable, determining that a job for obtaining the deliverable that is not the intermediate deliverable is a job to be executed by the job execution device of the standby system.

(Appendix 19)
The job management program described in Appendix 18, further determining whether the product determined to be the intermediate product will be used in the execution of a job that is not being executed and that is executed after the job that obtains the product, and if the product will be used in the execution of a job that is not being executed and that is executed after the job that obtains the product, determining that the job that obtains the product is a job to be executed by the job execution device in the standby system.

1, 4, 7 Job management device 11, 41 Acquisition unit 411 Time acquisition unit 412 Execution information acquisition unit 12, 42 Identification unit 421 Confirmation unit 422 Determination unit 71 Output unit 711 Management information output unit 712 Job net definition output unit 13, 43, 72 Control unit 44 Acquisition information storage unit 45, 73 Management information storage unit 46, 74 Job net definition storage unit 47 Reception unit 48 Replication unit 2, 5 Job management system 3, 6 Job execution device 31, 61 Output unit 311 Time output unit 611 Data output unit 312, 612 Execution information output unit 32, 62 Execution unit 33, 63 Data storage unit 34, 64 Execution information storage unit 35 Replication unit 8 Information processing device 81 Communication interface 82 Input/output interface 83 Arithmetic unit 84 Storage unit 85 Non-volatile storage unit 86 Drive unit 87 Recording medium

Claims (10)

an acquisition unit that acquires, when a failure occurs, a product of a job executed by an active job execution device that executes a job and execution information indicating a state of execution of the job by the active job execution device from a standby job execution device to which the execution information has been copied before the failure occurred in a system including the active job execution device;
a determination unit that determines whether or not to cause the job to be executed by the job execution device of the standby system based on management information, which is information for determining whether or not to cause the job to be executed by the job execution device of the standby system, and the acquired execution information, and that determines that the job to be executed is a job to be executed by the job execution device of the standby system;
a control unit for causing the job execution device of the standby system to execute the specified job,
Job management device. the management information includes execution status information, which is information indicating a status of a job to be executed by the job execution device of the standby system, and which is copied from a job management device of an active system included in a system including the job execution device of the active system before the occurrence of the failure,
The job management device according to claim 1, characterized in that the identification unit determines whether or not to cause the standby job execution device to execute a job for which the execution status information and the acquired execution information are inconsistent, based on the execution status information and the acquired execution information. 3. The job management device according to claim 2, wherein the identification unit determines, based on confirmed time information indicating the oldest time among the times when the deliverable and the execution information were copied from the job execution device of the active system and the times when the management information was copied from the job management device of the active system, the execution status information, and the acquired execution information, whether or not to cause the job execution device of the standby system to execute a job that was executed after a job for which, in the execution status information, information indicating that the job execution was completed by the time indicated by the confirmed time information is associated, and which is associated in at least one of the execution status information and the acquired execution information with information indicating that the job has been executed, before a final job that is executed last. The job management device according to any one of claims 1 to 3, characterized in that for a job to be judged, it is determined whether a normal product of the job exists in the standby job execution device or a specified storage device, and if a normal product exists, it is determined that a job that obtains the product for which it is determined that a normal product exists is a job that should not be executed by the standby job execution device. 5. The job management device according to claim 4, further determining whether the deliverable for which it is determined that there is no normal deliverable is an intermediate deliverable temporarily present in the job execution device of the standby system or a specified storage device, and if the deliverable is not the intermediate deliverable, determining that a job for obtaining the deliverable that is not the intermediate deliverable is a job to be executed by the job execution device of the standby system. 6. The job management device according to claim 5, further determining whether the product determined to be the intermediate product will be used in the execution of a job that is executed after the job that obtains the product and that is not yet executed, and if the product will be used in the execution of a job that is executed after the job that obtains the product and that is not yet executed, determining that the job that obtains the product is a job to be executed by the job execution device in the standby system. A job management device according to any one of claims 1 to 6,
the job execution device of the standby system;
A job management system comprising: When a failure occurs in a system including the job execution device of the active system, a product of the job executed by the job execution device of the active system that executes the job and execution information indicating the status of the job execution of the job execution device of the active system are acquired from a job execution device of the standby system to which the execution information has been copied before the failure occurs in the system including the job execution device of the active system;
determining whether or not to cause the job to be executed by the job execution device of the standby system based on management information, which is information for determining whether or not to cause the job to be executed by the job execution device of the standby system, and the acquired execution information, and identifying the job determined to be executed as the job to be executed by the job execution device of the standby system;
causing the job execution device of the standby system to execute the identified job;
Job management methods. the management information includes execution status information, which is information indicating a status of a job to be executed by the job execution device of the standby system, and which is copied from a job management device of an active system included in a system including the job execution device of the active system before the occurrence of the failure,
9. The job management method according to claim 8, further comprising the step of determining whether or not to cause the job execution device in the standby system to execute a job for which the execution status information and the acquired execution information are inconsistent, based on the execution status information and the acquired execution information. On the computer,
an acquisition function for acquiring execution information indicating a result of a job executed by an active job execution device that executes a job and a status of execution of the job by the active job execution device from a standby job execution device to which the execution information has been copied before a failure occurs in a system including the active job execution device, when the failure occurs;
a determination function for determining whether or not to cause the job to be executed by the job execution device of the standby system based on management information, which is information for determining whether or not to cause the job to be executed by the job execution device of the standby system, and the acquired execution information, and for specifying the job determined to be executed as the job to be executed by the job execution device of the standby system;
a job management program for implementing a control function for causing the job execution device of the standby system to execute the identified job.

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