JP4985033B2 - Backup program, backup method and backup device - Google Patents

Description

  The present invention relates to a backup program, a backup method, and a backup server device that are connected to a library device via a drive path, instruct search processing to the library device, and instruct data write processing after the search processing is completed.

  Conventionally, for users who need product management and customer management etc., if data such as product management and customer management disappears for some reason, there is a possibility of suffering huge disadvantages and avoiding it Therefore, the backup of the data is performed using a backup server device. Specifically, the backup server device reads backup data from a RAID (Redundant Arrays of Inexpensive Disks) device, instructs the library device to mount a backup tape and seek a tape, and writes the backup tape to the write position of the backup tape. Data write processing is instructed after the positioning is completed normally and a tape seek completion response is made from the drive. As the amount of data to be managed increases, the time required for backup processing also increases, so that a combination of a server device and a RAID device with higher processing capacity is used so that data to be backed up is not missed.

  For example, in Patent Document 1 (Japanese Patent Application Laid-Open No. 2006-277355), the backup server device stores write data in a storage area using a plurality of paths to the tape library apparatus and path switching software for switching paths. Are temporarily copied to the internal disk and then transferred to the tape library device, and the copy data is erased after the transfer is completed. And when a path failure occurs, by switching the path and repositioning the tape of the tape library device to the write restart position, and rewriting the data copied to the temporary recording area, Writing can be continued using data recorded in the temporary recording area.

JP 2006-277355 A

  Incidentally, the above-described conventional technique has a problem that the retry of the backup process is slow when an abnormality occurs in the drive path or the library apparatus. For example, even when an abnormality occurs in the drive path, the backup server device does not respond even if a predetermined time (60 minutes by default) elapses after instructing the library device to perform backup processing. For the first time, the backup processing is retried by recognizing that it is abnormal due to a timeout, so there is a problem that the retry of the backup processing is slow.

  Further, for example, even when an abnormality occurs during a tape seek, the backup server apparatus does not fail during a tape seek until the response is returned from the drive and the I / O process is interrupted by the OS (Operating System). Therefore, there is a problem that the retry of the backup process is slow.

Accordingly, the present invention has been made to solve the problems in the conventional technology, capable backup program to perform retry the backup process at an early stage, to provide a backup method and backup equipment For the purpose.

In order to solve the above-described problems and achieve the object, the present invention provides a library device and a drive path for writing data after mounting a storage medium on any of a plurality of drives and searching for a predetermined position on the storage medium. A backup program that is executed by a computer as a backup server device that is connected to the library device and instructs the library device to specify search processing by specifying a drive and a storage medium and to instruct data write processing after the search processing is completed In the period from when the search process is instructed until the data write process is completed, an abnormality detection procedure for detecting an abnormality by monitoring the state of the drive path and / or the library device, and the abnormality detection procedure If an abnormality is detected, another drive and And procedures retry to retry the backup process by instructing again search process a storage medium by specifying again, and characterized by causing a computer to execute the.

Further, in the present invention according to the above invention, when the abnormality is detected by the abnormality detection procedure during the search process, the retry procedure waits for a response from the library device while leaving the search process. In this case, a new process or thread is generated and the backup process is retried.

Further, in the present invention, in the above invention, the retry procedure instructs the library apparatus to interrupt the write process when an abnormality is detected by the abnormality detection procedure during the write process. The backup process is retried using the interrupted process or thread.

Further, the present invention is the processing status according to the above-mentioned invention, wherein the processing status indicates whether the processing status is currently in the search processing or the write processing from when the search processing is instructed until the data write processing is completed. A processing status information storage procedure for updating and storing information in a predetermined memory is further executed by the computer, and the retry procedure is executed according to the processing status information storage procedure when an abnormality is detected by the abnormality detection procedure. Referring to the processing status information stored in the memory, it is determined whether the processing status is currently being searched or written, and backup processing corresponding to each processing status is retried. And

Further, the present invention is the above invention, wherein a storage medium is mounted on any one of a plurality of drives and a predetermined position on the storage medium is searched for and then connected to a library device to which data is written via a drive path. A backup method applied to a backup server device that instructs a library device to specify a drive and a storage medium and instruct search processing, and instruct data write processing after completion of the search processing, and instructs the search processing Until the completion of the data writing process, the abnormality detection step of monitoring the drive path and / or the state of the library device to detect the abnormality, and when the abnormality is detected by the abnormality detection step, Specify another drive and another storage medium again for the library device and specify the search process again. Characterized in that it includes a retry process of retrying the backup process, the by.

Further, the present invention is the above invention, wherein a storage medium is mounted on any one of a plurality of drives and a predetermined position on the storage medium is searched for and then connected to a library device to which data is written via a drive path. A backup server device that designates a search process by designating a drive and a storage medium to a library apparatus, and instructs a data write process after completion of the search process, the data write process after instructing the search process Until the process is completed, an abnormality detection unit that monitors the drive path and / or the state of the library apparatus to detect an abnormality, and an abnormality is detected for the library apparatus when an abnormality is detected by the abnormality detection unit. Backup by specifying the drive and another storage medium again and instructing the search process again A retry means for retrying, and further comprising a.

According to the present invention, the backup server device designates the drive and storage medium to the library device and instructs the search processing until the data write processing is completed until the data write processing is completed. In addition, when an abnormality is detected, the backup process is retried by specifying another drive and another storage medium to the library device and instructing the search process again. Processing retries can be performed early. For this reason, it is possible to collect backup data according to the backup schedule and to prevent the backup data from being lost.

Further, according to the present invention, when an abnormality is detected during a search process for specifying a drive and a storage medium for the library apparatus, the backup server apparatus waits for a response from the library apparatus while leaving the search process. Therefore, it is possible to create a new process or thread and retry backup processing, so that it is possible to detect abnormalities early and to retry backup processing early, and to search for detected abnormalities. By leaving the processing, it is possible to avoid the abnormality being detected again by using the drive used in the search processing in other processing.

Further, according to the present invention, when the backup server apparatus detects an abnormality during the data write process in the library apparatus, the backup server apparatus instructs the library apparatus to interrupt the write process, and the interrupted process or thread is Since it was decided to retry the backup process by using it, it is possible to detect the abnormality early and to retry the backup process at an early stage, and in the detected I / O process, an abnormality in the medium Considering this possibility, it is possible to avoid detecting an abnormality again by using another drive and a tape medium.

Further, according to the present invention, the backup server apparatus is currently in the process of searching while the data write process is completed after designating the drive and storage medium to the library apparatus and instructing the search process. The processing status information indicating whether or not the writing process is in progress is updated and stored in a predetermined memory, and when an abnormality is detected, referring to the processing status information stored in the predetermined memory, Referencing whether the processing status is currently in search processing or writing processing, and decided to retry the backup processing according to each processing status, so the backup processing can be performed accurately and quickly according to each processing status. It is possible to retry.

  Embodiments of backup processing using a backup server device to which a backup program according to the present invention is applied will be described in detail below with reference to the accompanying drawings. In the following, the outline and features of the backup server device according to the present invention, the configuration of the backup server device and the flow of processing will be described in order, and finally the effects of this embodiment will be described.

[Overview and Features]
First, the outline and features of backup processing using the backup server device according to the first embodiment will be described with reference to FIG. FIG. 1 is an explanatory diagram illustrating an overview and characteristics of backup processing using the backup server device according to the first embodiment.

  As shown in FIG. 1, a backup server device according to the present embodiment includes a RAID (Redundant Array of Inexpensive Disks) device having a plurality of disks for storing data, a robot loaded with a backup tape, and a drive for writing data. Are connected so as to be capable of data communication via a path.

  An outline of backup processing using the backup server apparatus in such a configuration will be described. The backup server device makes a data read request to the RAID device according to a predetermined backup schedule, and reads the corresponding data from the RAID device (see (1) in FIG. 1).

  Subsequently, the backup server device that has received the corresponding data generates an I / O processing process according to the determined scheduling (see (2) in FIG. 1), a mount instruction for loading the backup tape into the robot, and the backup tape. Is issued to the library apparatus, and a data write instruction to write data to the drive is issued to the library apparatus (see (3) in FIG. 1).

  Then, mounting is performed by the library device (see (4) in FIG. 1), data is written by the drive (see (5) in FIG. 1), and the backup server device has successfully completed writing from the drive. When a signal to that effect is received, the library apparatus is instructed to unmount the backup tape from the robot. The library apparatus that has received the unmount instruction executes unmount processing (see (6) in FIG. 1).

  Although the backup process is performed in this way, the backup server device according to the first embodiment is mainly characterized in that the backup process is retried at an early stage.

  More specifically, the backup server device designates the drive and backup tape to the library device and instructs the seek processing until the data writing in the drive is completed. Is monitored (see FIG. 1A). If an abnormality is detected during the seek (see (C-1) in FIG. 1), the I / O processing process is notified (see (C-2) in FIG. 1), and the Seek process remains. Without waiting for a response from the library apparatus, a new process is generated and the backup process is retried (see (D-1) to (D-3) in FIG. 1).

  Further, when an abnormality is detected during I / O (see (C-1) in FIG. 1), the backup server device notifies the I / O processing process (see (C-2) in FIG. 1). The library apparatus is instructed to interrupt the write process, and the backup process is retried using the interrupted process (see (2) in FIG. 1) (see (E) in FIG. 1).

  For this reason, the backup server device according to the first embodiment can detect an abnormality at an early stage and execute a retry of the backup process at an early stage as described above. For this reason, it is possible to collect backup data according to the backup schedule and to prevent the backup data from being lost.

[Configuration of backup server]
Next, the configuration of the backup server apparatus shown in FIG. 1 will be described with reference to FIG. FIG. 2 is a block diagram showing the configuration of the backup server device. As shown in the figure, the backup server device 10 includes an I / F unit 11, a storage unit 12, and a control unit 13.

  The I / F unit 11 controls communication related to various information exchanged between the RAID device and the library device. Specifically, the I / F unit 11 inputs the data read from a RAID device having a plurality of disks in which data is stored, and outputs data to be written to the library device.

  The storage unit 12 stores data and programs necessary for various processes performed by the control unit 13, and includes a processing status information management table 12a that is particularly closely related to the present invention.

  The storage unit 12 stores information related to backup processing performed in the backup server device 10, the RAID device, and the library device. For example, the storage unit 12 relates to backup processing, status monitoring information indicating a status monitoring log, I / O processing information indicating an I / O processing log, processing start information indicating a backup processing start log, and completion of backup processing. Processing completion information indicating a log, error occurrence information indicating an error occurrence log, and the like are stored in association with the date and time when each processing information occurred. The storage unit 12 stores the backup start date and time, the disk identification information of the RAID device to be backed up, and the like when scheduling is performed for the backup process.

  The processing status information management table 12a stores various types of information related to backup processing in the library apparatus. Specifically, as illustrated in FIG. 3, the processing status information management table 12a is written with drive information indicating which drive is being used in the backup process performed in the library apparatus, and whether the seek process is being performed. Backup processing information indicating whether processing is in progress is stored.

  The control unit 13 includes an internal memory for storing a control program such as an OS (Operating System), a program that defines various processing procedures, and necessary data, and executes various processes using these, and in particular, the present invention. The data transmission / reception processing unit 13a, processing status information processing unit 13b, I / O processing control unit 13c, mount / unmount instruction unit 13d, seek start instruction unit 13e, status monitoring And a control unit 13f.

  The data transmission / reception processing unit 13a performs processing related to transmission / reception of data to be backed up. Specifically, when a backup process is instructed to start according to a predetermined backup schedule, the data transmission / reception processor 13a receives corresponding data from the RAID device. Then, the data transmission / reception processing unit 13a transmits the data to the drive of the library apparatus determined according to the control of the I / O processing control unit 13c described later.

  The processing status information processing unit 13b processes various types of information related to backup processing in the library apparatus. Specifically, when the seek process or the write process is started or completed in the library apparatus, the process status information processing unit 13b displays the process status information in the process status information management table 12a according to the started or completed process status. Update. Further, the processing status information processing unit 13b uses the processing status information management table 12a to refer to a seek process or a write process in the library apparatus and which drive is in use, and will be described later. Processing status information is notified to the / O processing control unit 13c.

  The I / O processing control unit 13c generates the I / O processing process shown in FIG. 1 and controls the backup processing. Specifically, when the data transmission / reception processing unit 13a receives data from the RAID device, the I / O processing control unit 13c receives the processing status information from the processing status information processing unit 13b, and executes the I / O processing process. A mount instruction and a seek start instruction are urged to the mount / unmount instruction unit 13d and the seek start instruction unit 13e, which are generated and described later. When the I / O processing control unit 13c prompts the mount / unmount instruction unit 13d to mount, the I / O processing control unit 13c sends a mount instruction signal to the state monitoring control unit 13f in order to start the state monitoring by the state monitoring control unit 13f. To notify.

  When the I / O processing control unit 13c receives an abnormality detection signal from the state monitoring control unit 13f described later during the seek processing, the I / O processing control unit 13c receives the processing status information from the processing status information processing unit 13b, and performs backup processing. Another drive and tape medium to be used for the retry are determined, a new I / O processing process is generated, and a mount instruction is prompted to the mount / unmount instruction unit 13d.

  Furthermore, when an abnormality detection signal is received from a state monitoring control unit 13f described later during the asynchronous I / O processing, the I / O processing control unit 13c interrupts the backup processing and processes the information processing unit 13b. After receiving the processing status information and determining another drive and tape medium to be used for retrying the backup process, the mount / unmount instruction unit 13d is prompted to mount the same in the same I / O processing process.

  The mount / unmount instruction unit 13d instructs the library device via the I / F unit 11 to mount / unmount under the control of the I / O processing control unit 13c. Specifically, the mount / unmount instruction unit 13d issues a mount instruction to the library apparatus when the backup process is started and the I / O processing control unit 13c prompts the mount instruction, and the backup process is completed. Then, an unmount instruction is issued to the library apparatus. The library apparatus that has received the mount or unmount instruction executes the backup tape mount or unmount for the corresponding robot.

  The seek start instructing unit 13e instructs the library device to start the seek through the I / F unit 11 under the control of the I / O processing control unit 13c. Specifically, the seek start instruction unit 13e issues a seek start instruction to the library apparatus when the backup process is started and the I / O processing control unit 13c prompts the seek start instruction. The library device that has received the seek start instruction executes the seek start of the backup tape to the corresponding robot and positions the backup tape at the backup tape writing position.

  The state monitoring control unit 13f monitors an abnormal state during I / O processing and seek processing related to backup processing from mounting to unmounting. Specifically, when receiving the mount instruction signal from the I / O processing control unit 13c, the state monitoring control unit 13f monitors the backup processing state until the unmount instruction signal is received, and if an abnormality is detected, the I / O processing is performed. An abnormality detection signal is notified to the control unit 13c.

  This state monitoring control unit 13f performs “throughput monitoring” for monitoring the processing capacity (data transfer amount) per unit time of the drive path, and the library device spontaneously issues failure information to the backup server device 10 when some hardware failure occurs. In particular, it is possible to detect an abnormality at an early stage by using “SNMP trap monitoring” for monitoring SNMP trap notified via a network.

[Status monitoring process by backup server]
Next, the state monitoring process by the state monitoring control unit 13f of the backup server device 10 will be described with reference to FIG. FIG. 4 is a flowchart showing the flow of state monitoring processing by the state monitoring control unit 13f shown in FIG.

  As shown in the figure, the state monitoring control unit 13f is in a state of waiting for receiving a mount instruction signal from the I / O processing control unit 13c (step S401), and receives the mount instruction signal from the I / O processing control unit 13c. If so (Yes in step S401), throughput monitoring for monitoring the processing capacity (data transfer amount) per unit time of the drive path is started (step S402).

  Subsequently, the state monitoring control unit 13f determines whether or not the period during which the throughput is “0” for several seconds or less than the threshold value continues for a certain period (step S403). In step S404, it is determined whether or not SNMP trap that spontaneously notifies failure information via the network is received (step S404) and whether or not an unmount instruction is issued from the I / O processing control unit 13c.

  Here, if the period during which the throughput falls below the threshold continues for a certain period (Yes in step S403) or if SNMPtrap is received from the library device (Yes in step S404), the state monitoring control unit 13f processes the information processing unit 13b. According to the control, the processing status information management table 12a is referred to (step S405).

  Then, if the tape seek processing is being performed in the processing status information management table 12a (Yes in step S406), the state monitoring control unit 13f indicates that an abnormality has occurred in the tape seek with respect to the I / O processing control unit 13c. If the tape seek process is not in progress (No at step S406), the I / O processing control unit 13c is notified that an abnormality has occurred in the asynchronous I / O (step S408).

  Further, when the state monitoring control unit 13f receives the unmount instruction signal from the I / O processing control unit 13c (Yes at Step S409), the state monitoring control unit 13f ends the state monitoring (Step S410) and unmounts from the I / O processing control unit 13c. If the instruction signal is not received (No at Step S409), the state monitoring is continued (Step S403 and Step S404).

[Backup processing by backup server]
Next, backup processing of the backup server device 10 will be described with reference to FIGS. 5 and 6 to 8. FIG. 5 is a flowchart showing the flow of backup processing by the backup server device 10 shown in FIG. 2, and FIGS. 6 to 8 show processing at the time of each processing related to backup held in the processing status information management table 12a. It is status information.

  As shown in FIG. 5, the backup server device 10 is in a state of waiting for backup processing start acceptance (step S501). If the backup processing start is accepted according to a predetermined backup schedule (Yes in step S501), data transmission / reception is performed. The processing unit 13a makes a data request to the RAID device and receives corresponding data from the RAID device (step S502).

  Subsequently, the I / O processing control unit 13c determines an available backup target (drive) while referring to the processing status information management table 12a according to the control of the processing status information processing unit 13b (step S503), and mounts it. The mount instruction is issued to the library apparatus via the / unmount instruction section 13d (step S504), and the tape seek processing start instruction is issued to the library apparatus via the seek start instruction section 13e (step S505).

  Here, the processing status information will be described. The processing status information when the backup target (drive) that can be used is determined by the I / O processing control unit 13c is in an initial state. Specifically, the backup processing information is “backup A: I / O processing not performed” and the drive information is “drive 1: free drive 2: free” (see FIG. 6A). Then, if the mount instruction is given to the library apparatus by the mount / unmount instruction unit 13d, the processing status information processing unit 13b updates the drive information to “drive 1: in use of backup A” (FIG. 6). (See (B)). Further, the processing status information processing unit 13b updates the backup processing information to “backup A: tape seek processing in progress” when the seek start instructing unit 13e instructs the library device to start the tape seek processing ( (See FIG. 6C).

  Then, the backup server device 10 determines whether or not the tape seek processing completion signal is received from the library device (step S506), and whether or not the SNMP monitor or the throughput abnormality signal is received in the state monitoring control unit 13f (step S507). Judge each one. If an SNMP trap or an abnormal throughput signal is received from the library device (Yes at step S507), the I / O processing control unit 13c generates another process and again determines another backup target (drive) ( Step S508).

  Here, the processing status information will be described. The processing status information processing unit 13b generates a separate process by the I / O processing control unit 13c and determines another backup target (drive) again. The processing information is updated to “backup A: I / O processing not executed” (see FIG. 6D).

  Further, when the backup server apparatus 10 detects an abnormality in step S507 and generates another process and determines another backup target (drive) in step S508, it issues a mount instruction to the library apparatus again. (Step S504), an instruction to start the tape seek process is given to the library apparatus (step S505). If the library device detects an abnormality related to a hardware failure of the tape medium, the backup server device 10 cannot interrupt the I / O processing process, so leave the processing of the detected drive as it is. (Step S509) When the response is returned from the drive, the I / O processing process is stopped (Step S510).

  Here, the processing status information will be described. The processing status information processing unit 13b generates another process in step S508 by the I / O processing control unit 13c, determines another backup target (drive), and the library apparatus again. If the mount instruction is issued, the drive information is updated to “drive 1: backup A in use (abnormal) drive 2: backup A in use” (see FIG. 6E). The processing status information processing unit 13b updates the backup processing information to “backup A: tape seek processing in progress” when the seek start instructing unit 13e instructs the library device to start the tape seek processing again. (Refer to FIG. 6F).

  Next, when the backup server apparatus 10 receives the Seek processing completion signal from the library apparatus in step S506 (Yes in step S506), the backup server apparatus 10 controls the data transmission / reception processing unit 13a with respect to the data transmission / reception processing unit 13a. The library apparatus is instructed to start data I / O processing for transmitting data received from the library apparatus (step S511), and a data write instruction is issued to the drive of the library apparatus (step S512).

  Here, the processing status information will be explained. When the backup server device 10 instructs the library device to start the data I / O processing, the processing status information processing unit 13b displays the backup processing information as “backup A: Update to “data I / O processing in progress” (see FIG. 7A).

  Then, the backup server device 10 determines whether or not the tape seek processing completion signal has been received from the library device (step S513), and whether or not the SNMP monitor or throughput abnormality signal has been received in the state monitoring control unit 13f (step S514). Judge each one. Here, if an SNMP trap or a throughput abnormality signal is received from the library device (No at Step S514), the backup server device 10 interrupts the data I / O processing (Step S515), via the mount / unmount instruction unit 13d. An unmount instruction is issued to the library apparatus (step S516), and another backup target (drive) is determined using the same I / O processing process (step S517).

  Here, the processing status information will be described. If the I / O processing is interrupted by the backup server device 10, the processing status information processing unit 13 b displays the backup processing information as “backup A: data I / O processing not executed”. (See FIG. 7B). In addition, when the mount / unmount instruction unit 13d gives an instruction to unmount the library apparatus, the processing status information processing unit 13b updates the drive information to “drive 1: free” (see FIG. 7C). ). In addition, the processing status information when the backup server device 10 determines another backup target (drive) using the same I / O processing process is in the above-described initial state ((D) in FIG. 7). reference).

  Furthermore, if the backup server apparatus 10 detects an abnormality in step S514 and determines another backup target (drive) using the same process in step S517, it issues a mount instruction to the library apparatus again. (Step S504), an instruction to start the tape seek process is issued (step S505).

  If the backup server device 10 receives a data I / O processing completion signal from the library device in step S513 (Yes in step S513), the backup server device 10 passes the mount / unmount instruction unit 13d according to the control of the I / O processing control unit 13c. Then, an unmount instruction is issued to the library device (step S518).

  Here, the processing status information will be described. When the processing status information processing unit 13b receives the data I / O processing completion signal from the backup server device 10 in step S513, the processing status information processing unit 13b sets the backup processing information to “backup A: I / O”. The processing is updated to “completion of processing” (see FIG. 8A). Note that the processing status information when the mount / unmount instruction unit 13d issues an unmount instruction to the library apparatus is in the initial state described above (see FIG. 8B).

[Effect of Example 1]
As described above, the backup server device 10 according to the first embodiment performs state monitoring during the tape seek process and the asynchronous I / O process for the backup process, thereby detecting an abnormality at an early stage and restarting the backup process. Trials can be performed early. For this reason, it is possible to collect backup data according to the backup schedule and to eliminate backup data loss.

  Also, according to the first embodiment, when an abnormality is detected during the seek processing, the backup processing is retried while leaving the seek processing, so that the abnormality is detected early and the backup processing is retried early. It is possible to execute the process and leave the Seek process with many abnormality detections due to a hardware failure in the medium, thereby avoiding the use of the drive used in the Seek process in another process and detecting the abnormality again. Is possible.

  Also, according to the first embodiment, if an abnormality is detected during I / O processing, the I / O processing is interrupted and the backup processing is retried. Retry can be executed early, and another drive and tape can be used in consideration of the possibility of abnormality in the medium in I / O processing where there are many abnormality detections in the drive path between the backup device and the library device. It is possible to avoid being detected again by using the medium.

  In addition, according to the first embodiment, when the backup process is instructed to the library apparatus, the processing status information management table 12a is referred to, and the backup tape and drive for performing the backup process are determined. The backup process can be started or retried accurately and quickly according to each processing situation.

  Although the embodiments of the present invention have been described so far, the present invention may be implemented in various different forms other than the embodiments described above. Therefore, different embodiments will be described by dividing them as follows.

[Monitoring target]
In the first embodiment described above, the case where both the seek processing by the library apparatus and the I / O processing by the drive path are monitored has been described. However, the present invention is not limited to this, and during the seek processing or I The present invention can be similarly applied even when only one of the / O processes is monitored.

[Configuration of Backup Server Device, RAID Device, and Library Device]
In the first embodiment, the backup server device, the RAID device, and the library device are described as being configured in a one-to-one relationship. However, the present invention is not limited to this, and any relationship is possible. For example, it may be configured by a relationship among a plurality of RAID devices, one backup server device, and one library device. For example, if the same data is stored in a plurality of RAID devices and one RAID device cannot be used due to a hardware abnormality, backup processing is performed using data of the RAID device and another RAID device. Become.

[Storage area]
In the first embodiment, the case where the storage area is divided into the storage unit inside the apparatus and the disk outside the apparatus has been described. However, the present invention is not limited to this, and one storage is provided. The configuration may be integrated in the area. For example, the storage unit 12 of the backup server device 10 may store data to be subjected to backup processing, or the library device may store a copy of the data.

[System configuration]
Further, each component of each illustrated apparatus is functionally conceptual, and does not necessarily need to be physically configured as illustrated. That is, the specific form of distribution / integration of each device is not limited to the illustrated one. For example, the data transmission / reception processing unit 13a is distributed to a data transmission processing unit that performs data transmission and a data reception processing unit that performs data reception. For example, all or a part thereof can be configured to be functionally or physically distributed / integrated in arbitrary units according to various loads or usage conditions. Furthermore, all or a part of each processing function performed in each device may be realized by a CPU and a program that is analyzed and executed by the CPU, or may be realized as hardware by wired logic.

  In addition, among the processes described in the present embodiment, all or part of the processes described as being automatically performed can be performed manually, or the processes described as being performed manually can be performed. All or a part can be automatically performed by a known method. For example, in the above-described embodiment, the case where data transmission from the RAID device to the backup server device 10 is automatically performed according to the scheduling has been described. However, the operation may be started by the operator performing a predetermined operation. . In addition, the processing procedure, control procedure, specific name, and information including various data and parameters shown in the above-described document and drawings can be arbitrarily changed unless otherwise specified.

[Backup program]
By the way, in the above embodiment, the case where various processes are realized by hardware logic has been described. However, the present invention is not limited to this, and is realized by executing a program prepared in advance by a computer. You may do it. Therefore, in the following, an example of a computer that executes a backup program having the same function as the backup server apparatus shown in the above embodiment will be described with reference to FIG. FIG. 9 is a diagram illustrating a computer that executes a backup program.

  As shown in the figure, a computer 110 as a backup server device is configured by connecting a keyboard 120, an HDD 130, a CPU 140, a ROM 150, a RAM 160, and a display 170 via a bus 180 or the like.

  The ROM 150 has a backup program that exhibits the same function as the backup server device 10 shown in the first embodiment, that is, as shown in FIG. 9, a search processing instruction program 150a, an abnormality detection program 150b, and a retry program. 150c is stored in advance. Note that these programs 150a to 150c may be appropriately integrated or distributed in the same manner as each component of the backup server apparatus shown in FIG.

  The CPU 140 reads out these programs 150a to 150c from the ROM 150 and executes them, so that the programs 150a to 150c are retried as shown in FIG. 9, the search processing instruction process 140a, the abnormality detection process 140b, and the retry process. It functions as the process 140c. The processes 140a to 140c correspond to the seek start instruction unit 13e, the state monitoring control unit 13f, and the I / O processing control unit 13c shown in FIG.

  Then, the CPU 140 executes a backup program based on the processing status information data 160a recorded in the RAM 160.

  The above-described programs 150a to 150c are not necessarily stored in the ROM 150 from the beginning. For example, a flexible disk (FD), a CD-ROM, a DVD disk, and a magneto-optical disk inserted into the computer 110. Connected to the computer 110 via a "portable physical medium" such as an IC card, or a "fixed physical medium" such as an HDD provided inside or outside the computer 110, and further via a public line, the Internet, a LAN, a WAN, etc. Each program may be stored in “another computer (or server)” or the like, and the computer 110 may read and execute each program from now on.

As described above, the backup program according to the present invention, a backup method and backup equipment is useful in the backup processing using the backup server device, in particular, monitors the at processing conditions or at I / O Seek, This is suitable for quickly retrying backup processing when an abnormality occurs in a drive path or library device.

It is explanatory drawing which shows the outline | summary and characteristic of the backup process using the backup server apparatus which concerns on Example 1. FIG. It is a block diagram which shows the structure of a backup server apparatus. It is a figure which shows an example of the processing status information management table shown in FIG. It is a flowchart which shows the flow of the state monitoring process by the state monitoring control part shown in FIG. It is a flowchart which shows the flow of the backup process by the backup server apparatus shown in FIG. It is a figure which shows the processing status information at the time of the Seek process concerning the backup which the processing status information management table shown in FIG. 2 hold | maintains. FIG. 3 is a diagram showing processing status information at the time of I / O processing related to backup held in the processing status information management table shown in FIG. 2. FIG. 3 is a diagram showing processing status information when backup processing related to backup held in the processing status information management table shown in FIG. 2 is completed. It is a figure which shows the computer which performs a backup program.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Backup server apparatus 11 I / F part 12 Storage part 12a Processing status information management table 13 Control part 13a Data transmission / reception processing part 13b Processing status information processing part 13c I / O processing control part 13d Mount / unmount instruction part 13e Seek start instruction part 13f Status monitoring control unit 110 Computer 120 Keyboard 130 HDD
140 CPU
140a Search processing instruction process 140b Anomaly detection process 140c Retry process 150 ROM
150a Search processing instruction program 150b Abnormality detection program 150c Retry program 160 RAM
160a Processing status information data 170 Display 180 Bus

Claims (7)

Mount a storage medium on one of multiple drives, search for a predetermined location on the storage medium, and then connect to the library device to which data is written via a drive path, and specify the drive and storage medium for the library device a backup program that is executing the write processing of the data after the search process completion indication to the Turkish computer instructs the search process and,
During the period from the instruction to the search processing until the write processing of the data is completed, the abnormality detection procedure for detecting an abnormality by monitoring the status of the drive path and / or library unit,
If an abnormality is detected during the search process by the abnormality detection procedure, the library apparatus is separated from the library apparatus without waiting for a response from the library apparatus while leaving a process or thread for executing the search process. the drive and other storage medium is specified, the procedure retries to retry the backup process to generate a process or thread of the new search process,
A backup program characterized by causing a computer to execute. Mount a storage medium on one of multiple drives, search for a predetermined location on the storage medium, and then connect to the library device to which data is written via a drive path, and specify the drive and storage medium for the library device a backup program that is executing the write processing of the data after the search process completion indication to the Turkish computer instructs the search process and,
During the period from the instruction to the search processing until the write processing of the data is completed, the abnormality detection procedure for detecting an abnormality by monitoring the status of the drive path and / or library unit,
If an abnormality is detected by the abnormality detection procedure during the data writing process, the library apparatus is instructed to interrupt the process or thread that executes the data writing process, and the interrupted process or thread is A retry procedure to use and retry the backup process ,
A backup program characterized by causing a computer to execute. During said search process after instructing to write processing of the data is completed, stores the process status information currently processing status indicates whether being or write process is being search process to update the predetermined memory To further execute the processing status information storage procedure to be performed,
The retry procedure refers to the processing status information stored in a predetermined memory by the processing status information storage procedure when an abnormality is detected by the abnormality detection procedure, and the processing status is currently being searched. 3. The backup program according to claim 1, wherein it is determined whether there is a write process or not, and the backup process corresponding to each process status is retried. Mount a storage medium on one of multiple drives, search for a predetermined location on the storage medium, and then connect to the library device to which data is written via a drive path, and specify the drive and storage medium for the library device a backup method that is applied to the backup equipment to instruct the writing process of the data after the search process is completed instructs the search process and,
During the period from the instruction to the search processing until the write processing of the data is completed, the abnormality detecting step of detecting an abnormality by monitoring the status of the drive path and / or library unit,
If an abnormality is detected during the search process by the abnormality detection step, the library apparatus is separated from the library apparatus without waiting for a response from the library apparatus while leaving a process or thread for executing the search process. the drives and other storage media specify the a retry process to retry the backup process to generate a process or thread of the new search process,
The backup method characterized by including. Mount a storage medium on one of multiple drives, search for a predetermined location on the storage medium, and then connect to the library device to which data is written via a drive path, and specify the drive and storage medium for the library device A backup method applied to a backup device that instructs a search process and instructs a data write process after the search process is completed,
  An abnormality detection step of detecting an abnormality by monitoring the state of the drive path and / or the library device from the time when the search process is instructed until the completion of the data writing process,
  When an abnormality is detected by the abnormality detection step during the data writing process, the library apparatus is instructed to interrupt the process or thread that executes the data writing process, and the interrupted process or thread is A retry process to retry the backup process using,
  The backup method characterized by including. Mount a storage medium on one of multiple drives, search for a predetermined location on the storage medium, and then connect to the library device to which data is written via a drive path, and specify the drive and storage medium for the library device a backup equipment which instructs the writing process of the data after the search process is completed instructs the search process and,
And the search during processing after the instruction until the write processing of the data is completed, the abnormality detecting means for detecting an abnormality by monitoring the status of the drive path and / or library unit,
If an abnormality is detected by the abnormality detection means during the search process, the library apparatus is separated from the library apparatus without waiting for a response from the library apparatus while leaving a process or thread for executing the search process. the drive and other storage medium is specified, and retry means for retrying the backup process to generate a process or thread of the new search process,
Backup equipment, characterized in that it comprises a. Mount a storage medium on one of multiple drives, search for a predetermined location on the storage medium, and then connect to the library device to which data is written via a drive path, and specify the drive and storage medium for the library device And a backup device for instructing search processing and instructing data write processing after the search processing is completed,
  An abnormality detection means for monitoring the drive path and / or the state of the library device to detect an abnormality from the time when the search process is instructed until the time when the data writing process is completed,
  If an abnormality is detected by the abnormality detection means during the data writing process, the library apparatus is instructed to interrupt the process or thread that executes the data writing process, and the interrupted process or thread is Retry means to use and retry the backup process,
  A backup device characterized by comprising:

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