JPH07141308A - Back-up method in information processing system - Google Patents

Abstract

PURPOSE:To provide a back-up method which can back up information processing system with high efficiency even against a disater without duplexing a processor. CONSTITUTION:The information processors P1 to P3 which are distributed at remote places are connected together via a network. A data storage 4 of each processor includes a self-data storing area 4a which stores its own processing data and a back-up data storing area 4b which stores the processing data on other processors as the back-up data. When processing data are updated, the data stored in the area 4a of the main information processor and the data stored in the area 4b of the back-up information processor are updated simultaneously. So that the back-up data can be surely protected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a backup method for an information processing system in which a plurality of processing devices are connected to each other via a network so as to be able to exchange data with each other.

[0002]

2. Description of the Related Art In this type of information processing system, predetermined information processing is performed by exchanging data between a plurality of processing devices connected by a network, but preventing the accumulated information from being lost. For this reason, the stored information is backed up. As this backup method, two methods, a simple backup method and a duplicated backup method, are adopted.

In the simple back method, the stored information is stored in an inexpensive auxiliary storage medium such as a magnetic tape at predetermined time intervals (for example, at the end of each work day), and when an abnormality occurs, the backup data of the auxiliary storage medium is processed by the processing device. I'm trying to load it. The dual backup method is adopted in a system that requires high reliability, and it doubles the storage unit such as a magnetic disk or the processing device itself to bring one of the processing devices into an operating state, The other processing device is placed in a standby state.

[0004]

However, in the backup method in the above-mentioned conventional information processing system, the simple backup method requires a very long time to store the backup data and needs to perform the backup regularly. Therefore, because the user's burden is heavy and the backup is performed regularly, if an error occurs in the storage device, the processing data accumulated between the time of the previous backup and the time of the error will be lost. However, there is an unsolved problem that it cannot be called a reliable backup method.

Further, in the redundant backup method, the processing data of the standby system does not almost disappear when the processing system of the active system goes into an operating state when an abnormality occurs in the processing system of the active system. Since the standby processing equipment is installed in one place, when a power failure or disaster occurs at the installation location, both the operating system and the standby system cannot be used, and they do not serve as backup and Since at least two sets of a device and a storage device are required, a large occupied area is required, equipment cost is increased, and either one of the processing devices becomes a standby system. There is an unsolved problem that the usage efficiency is very poor.

Therefore, the present invention has been made by paying attention to the unsolved problem of the backup method in the above-mentioned conventional information processing system, and it is possible to perform backup even in the event of a disaster without duplicating the processing device, thus improving the efficiency of use. It aims at providing a backup method in a good information processing system.

[0007]

In order to achieve the above object, a backup method in an information processing system according to a first aspect of the present invention is an information processing system in which a plurality of processing devices distributed at remote locations are connected by a network. At
At least one of the processing devices has at least a data storage area for storing its own processing data and a data storage area for storing the processing data of other processing devices, and each processing device sends its own processing data together with its own processing data. It is characterized in that the processing data of another processing device that has been acquired is stored in the data storage area for backup.

According to a second aspect of the backup method in the information processing system, when an abnormality occurs in any one of the processing device and its data storage area, the backup method is used for backup in the data storage area of the processing device. The other processing device that held the processing data is characterized in that the sending of the processing data to the abnormality processing device is interrupted, and the latest processing data is sent to the processing device that has recovered abnormally after the error recovery. There is.

Further, in the backup method in the information processing system according to claim 3, when an abnormality occurs in any one of the processing device and the data storage area in which the other processing device has backed up its own processing data, It is characterized in that its own processing is transferred from the processing apparatus to another processing apparatus.

[0010]

In the backup method of the information processing system according to the first aspect, the processing devices distributed at remote locations are connected by a network, and each processing device stores its own processing data and another processing device. Since it has at least a data storage area for storing the processing data of as a backup data, the processing data of a certain processing device is stored in its own data storage area, and
It is also stored in the data storage area of a remote processing device via the network, and even if an error occurs in its own processing device or its data storage area, backup data is saved in the data storage area of the remote processing device, Each processing device stores backup data of another processing device while performing its own information processing.

Further, in the backup method in the information processing system according to the second aspect, when an abnormality occurs in any of the processing device and its data storage means,
The other processing device that has retained its own processing data for backup in the data storage area of the processing device is meaningless to the abnormality generation processing device by interrupting the transmission of the processing data to the abnormality generation processing device. Data update is interrupted, and after the abnormal recovery, the latest processed data is sent to the abnormally recovered processing device to protect the backup data.

Further, in the backup method in the information processing system according to the third aspect of the present invention, when an abnormality occurs in any one of the processing device and its data storage area in which the other processing device has backed up its own processing data. , And transfers its processing from the processing device to another processing device, and continues the backup data update process.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram showing a network configuration of an embodiment of the present invention, in which a plurality of, for example, three remote areas are respectively provided with local area networks LAN _{1 to} LAN ₃ ,
These local area networks LAN _{1 to} LAN ₃
Are connected to each other via transmission lines L _{1 to} L ₃ and a switching network T, which are public lines or dedicated lines, and processing data can be transmitted bidirectionally between the local networks LAN _{1 to} LAN ₃ .

Each local area network LAN₁~
LAN₃And the information processing device P, respectively. ₁~ P₃And multiple analogies
If two terminal devices DT₁₁, DT₁₂, DT_{twenty one,}DT_{twenty two}as well as
DT _31,DT₃₃ Are connected. Each information processing device P
₁~ P₃Each has a buffer memory, as shown in FIG.
Via the communication control device 1 equipped with
Work LAN₁~ LAN₃Data processing professional connected to
Equipped with Sessa 2. In this data processor 2
Is a status monitor for other processing equipment that monitors the operating status of other processing equipment.
The monitoring results of the viewing unit 3 and the other processing device status monitoring unit 3 are displayed.
Other processor status storage file F to be stored₁, Of self-processing equipment
Local processing device status storage file F that stores the operating status₂Over
And a history file F for storing information update history₃Is connected
And the data storage device 4 such as a hard disk
Connected via the access control device 5,
In order to back up the processing data of the information processing device in advance
Update when another set information processing device is abnormal
Update data of backup data via the storage controller 6.
Update-waiting data file F that stores data_FourIs connected
And the abnormal information processing device has recovered.
And the update-waiting data file F_FourWaiting for update stored in
Update data at recovery that sends data to the recovered information processing device
The data transmission control device 7 is connected.

Here, the data storage device 4 performs its own processing.
Own data as the first data storage for storing data
Data storage unit 4a and the buffer from another preset processing device.
As a second data storage unit for storing backup data
All the backup data storage units 4b are included. Well
In addition, whether the access control device 5 is the data processor 2
When there is a data access request from the
Data is stored in its own data storage unit 4a and backup data
Refer to the information location management unit 8 to determine which one of the storage units 4b exists.
Access to the determined data storage unit
I do. Here, the information location management unit 8 is shown in FIG.
Information identifier that indicates the type of processed data and this information
The processed data corresponding to the identifier is stored in the own data storage unit 4a.
Stored main information processor number and backup
Backup information processing stored in the data storage unit 4b
The device number, date and time of occurrence, deletion date and time, and
Information such as search information is stored in tabular form for information identification.
Main information processing device and backup information processing based on child
It is configured to search for devices. In addition, this implementation
In the example, the management information of the unique information of each processing device
Figure 4 shows the relationship between the processor and the backup information processor.
As shown, for the processed data D1, the information processing device
P₁Is a main processing unit, information processing unit P₂Backed up
Regarding the processed data D2 which are set in the information processing devices respectively,
Is the information processing device P₁Is the main information processor, information processor
Setting P ₃Are set in the backup information processing device, and
For the physical data D3, the information processing device P₂Information
Processing device, information processing device P₃Backup information processing equipment
The processing data D4 is set in the information processing area.
Processing device P₃Is the main information processor, information processor P₁But
It is set in each of the backup information processing devices.

Further, in the other processor status file F ₁ , as shown in FIG. 5, the partner processor number for each processing data, the processor type indicating whether the partner processor is the main processor, and the partner processor The operating state of the processing device and the operating time zone of the other processing device are stored in a table. Here, "1" is stored in the processing device type when the partner information processing device is the main data processing device, and "0" is stored when the partner information processing device is not the main data processing device. “0” is stored when the device is in a normal operating state, “1” is stored when the device is in a normal stop state, “2” is stored when the device is in failure, and “3” is stored when the device is recovering from the failure. Note that if the status of the partner information processing apparatus is "2" that is in failure or "3" that is being recovered and is in the operating time period, the self-processing apparatus updates the information.

Furthermore, the self-processing apparatus status file F ₂
6, a partner processing device number, a processing device type indicating whether or not the partner processing device is a backup processing device, a status of the self-processing device with respect to the partner processing device, etc. are tabulated as shown in FIG. Has been stored. Here, "1" is stored in the processing device type when the partner information processing device is the backup processing device, and "0" is stored when the partner information processing device is not the backup processing device. Is "0" when it is, and "1" when it is waiting for recovery from the failure state,
"2" when recovery is in progress, "3" when the data update of the part that has information with the other party information processing device is possible, and "3" when there is double information with the other information processing device. "4" is stored when the update is impossible, and the status of the self-processing apparatus for this partner processing apparatus is a value other than "0" when the self-processing apparatus ends abnormally at the subsequent startup. It is stored so that the self-processing device can recognize that it has terminated abnormally, and this value is set to "1" which represents a wait for recovery.

Then, the data processor 2 receives the update request for the processed data from each of the terminal devices DT _i1, DT _i2 (i = 1, 2, 3) or another information processing device.
The information update process is performed, the updated data is stored in its own data storage unit 3a, and is stored in the backup data storage unit 3b of another preset processing device, and at the same time the preset other processing device is set. updated when an access request to update the backup update data, accesses the backup data storage section 3b, and update processing of the back-up data, each time the update data to the information update history file F ₃ from The history is stored, the abnormal state of itself and the data storage device 3 and the abnormal states of other processing devices are monitored, and the backup process corresponding to these abnormal states is executed.

When the information processing apparatus P _i connected to the local area network LAN _i to which it belongs is normal, each terminal apparatus DT _i1 and DT _i2 receives data from the information processing apparatus P _i. However, when the corresponding information processing device P _i is abnormal, data is transferred to and from another information processing device in a preset order.

Next, the operation of the above embodiment will be described with reference to the information processing apparatus P.
An example of the processing procedure of _{1 to} P ₃ will be described with reference to the flowchart of FIG. 7. Each of the information processing devices P _{1 to} P ₃ executes the main program process of FIG. 7 when it is started or restarted. In this main program processing, first, in step S1, whether "0" representing a normal stop state is set as the state S _A of the own processing device with respect to each partner processing device by referring to the own processing device state file F ₂ . Determine whether or not. At this time, if the normal stop state is caused by the end of the work time at the end of the previous processing, S _A = “0”
Therefore, the process proceeds to step S2, the information processing shown in FIG. 8 is started, and when a normal stop state occurs due to the end of the working time, the process proceeds to step S3 and the self-processing apparatus state file F ₂ The processing is terminated after setting "0" indicating the normal stop state as the state S _A of the self processing apparatus for all the partner processing apparatuses.

On the other hand, if the result of the determination in step S1 is that the state S _A of the self-processing device with respect to the partner processing device in the self-processing device state file F ₂ is set to a value other than "0", After shifting to S4, the state S _A of the own processing device for the corresponding partner processing device is set to “1” which represents a wait for recovery, and then the process proceeds to step S5 where the information processing device of the self processing device is set according to a preset order. To the main information processing device or another information processing device serving as a backup information processing device, an operation start notification is transmitted, and then, in step S6, whether or not there is a recovery update request from the other information processing device. If there is no update request for recovery, the process directly goes to step S13. If there is an update request for recovery, the process goes to step S7, and the self-processing apparatus state file F _As the state S _A of the own processing device with respect to the other processing device of ₂ , "2" indicating that the recovery is in progress is set.

Next, in step S8, the update data stored in the other party information processing apparatus is received, and the self data storage area 4a and the backup data storage area of the data storage unit 4 are received based on the identifiers. 4b, the process of updating the relevant data is executed, and then the process proceeds to step S9 to determine whether or not the recovery completion notification has been received from the partner information processing device. If the recovery completion notification has not been received, the step is performed. Returning to S8, when the recovery completion notification is received, the process proceeds to step S10, it is determined whether or not the own information processing device is the main information processing device with respect to the partner processing device, and it is the main information processing device. In some cases, the process proceeds to step S11, and the self-processing device status file F ₂
As the state S _A of the self-processing device for the backup information processing device, “3” indicating the state in which the part in which information is redundantly stored with the partner processing device can be updated is set, and then the process proceeds to step S13. If the information processing apparatus is a backup information processing apparatus for the partner information processing apparatus, step S
12, the state S _A of the self-processing device with respect to the partner processing device in the self-processing device status file F ₂ represents a state in which the part that stores information in duplicate with the partner processing device cannot be updated. After setting "4", the process proceeds to step S13.

In step S13, it is determined whether or not an operation start notification has been transmitted to its own information processing apparatus to all other information processing apparatuses serving as a main information processing apparatus or a backup information processing apparatus. If there is another information processing device that has not transmitted the operation start notification, the process returns to step S5, and if the operation start notification has been transmitted to all the information processing devices, the process proceeds to step S14. Then, an operation start notification is transmitted to the information processing apparatus of its own and the remaining information processing apparatuses which are not backup information processing apparatuses, and then the process proceeds to step S2 to start information processing. .

In the information processing in step S2, as shown in FIG. 8, first, in step S2a, the terminal devices DT _i1 and DT are connected.
_If there is a data update request from _i2 or another information processing device, and if there is no data update request, the process directly goes to step S2s to determine whether or not the operation is completed, and if there is a data update request. Moves to step S2b,
After the information processing management information unit 8 determines the main information processing device MP and the backup information processing device BP that manage the updated data from the identifier of the data for which the data update request has been issued, the process proceeds to step S2c.

In this step S2c, it is determined whether or not the main information processing device MP is its own information processing device. In this case, if its own information processing device is the main information processing device MP, the process proceeds to step S2d. Data Dj (j = 1 to 4) stored in the self-data storage area 4a
After performing the update process of No., the process proceeds to step S2e. In step S2e, it determines whether the backup information processing apparatus BP is normal with reference to other processor state file F _1.

At this time, the backup information processing apparatus B
When P is in a normal state, the process proceeds to step S2f to send a data update request to the backup information processing device BP, and then proceeds to step S2g to receive the update permission from the backup information processing device BP. If the update permission is not received, the process returns to step S2e. If the update permission is received, the process proceeds to step S2h to send the update data to the backup information processing device BP, and then the step S2s. Move to.

As described above, when the main information processing device MP and the backup information processing device BP are both in a normal state, a data update request is sent to both the information processing devices MP and BP to update the data. Therefore, since the data is stored in the data storage device 4 of at least two information processing devices that are separated from each other, even if an abnormal state occurs in either the main information processing device or the backup information processing device, the update data is protected. Can be reliably performed.

If the result of determination in step S2e is in an abnormal state due to a power failure or disaster in the backup information processing device BP or an abnormality in the data storage unit 4, etc., the process proceeds from step S2e to step S2i to update. After storing the data in the update waiting data file F ₄ via the update storage controller 6, the process proceeds to step S2s,
It is determined whether the work is completed.

On the other hand, if the result of determination in step S2c is that the information processing apparatus of its own is not the main information processing apparatus MP, the process proceeds to step S2j, and the corresponding main information processing apparatus MP is operating normally. Whether or not it is determined by referring to the other processing device status file F ₁ and the main information processing device MP is operating normally, step S2k
And sends an information update request to the main information processing device MP, then moves to step S2m, determines whether or not the update permission for the data update request has been received from the main information processing device MP, and updates. When the permission is not received, the process returns to step S2k, and when the update permission is received, the process proceeds to step S2m, the update data is transmitted to the information processing device MP, and then the information update process is ended.

Further, when the result of determination in step S2j is that the main information processing device is abnormal, the process proceeds to step S2o and the backup information processing device BP.
Is in a normal state, and when the backup information processing device BP is in a normal state, step S2
In step p2, the information update request is sent to the backup information processing device BP, and then in step S2q, it is determined whether the update permission for the data update request is received from the backup information processing device MP. If the update permission has not been received, the process returns to step S2p. If the update permission has been received, the process proceeds to step S2r, the update data is transmitted to the backup information processing device BP, and then the process proceeds to step S2s.

Furthermore, when the result of the determination in step S2o is that the backup information processing device BP is in an abnormal state, the process proceeds to step S2s without performing the update process, and it is determined whether or not the work is finished, and it is not the work finished. Sometimes, the process returns to step S2a, and when the job is completed, the process proceeds to step S23 in FIG. Furthermore, in each of the information processing devices P _{1 to} P ₃ , when the other processing device monitoring unit 3 detects an abnormality in the other information processing device, the abnormality detection process of FIG. 9 is performed as a timer interrupt process at predetermined time intervals. Run.

In this abnormality detection process, first, step S3
In step 1, "2" indicating an abnormal state is set as the state S _B of the other processing apparatus corresponding to the other processing apparatus that has detected the abnormality, and then the process proceeds to step S32, where the abnormality processing apparatus is its own information processing apparatus. For backup information processing device BP
Information processing device B for backup
If it is P, the process proceeds to step S33, and when there is a data update request for data that matches the backup information processing device BP in its own data storage area 4a, that data update process is performed, and then step S34. And the backup data is accumulated in the update waiting data file F ₄ , then the process proceeds to step S35, it is determined whether or not there is an operation start notification from the abnormal information processing device, and when there is no operation start notification, Returning to step S33, when the operation start notification is given,
Control goes to step S36.

In step S36, the operating state S _B of the other processing device in the other processing device state file F ₁ is set to "3" indicating that the recovery is in progress, and then the process proceeds to step S37 to set the update controller 7 during recovery. When the backup information processing device BP stored in the update waiting data file F ₄ is activated, the update data when the backup information processing device BP is in the abnormal state is transmitted to the backup information processing device BP, and then step S38.
If it is determined that the transmission of the update data has been completed and the data transmission has not been completed, step S
Returning to 37, when the data transmission is completed, the process proceeds to step S39.

In this step S39, "0" representing the normal operating state is set as the operating state S _B of the other processing device in the other processing device state file F ₁ , and then step S40.
Then, after the recovery completion notification is transmitted to the backup information processing apparatus BP, the abnormality detection interrupt processing is ended. If the determination result of step S32 is that the partner information processing device is not the backup information processing device BP for its own information processing device, the process proceeds to step S41 and the partner information processing device determines It is determined whether or not it is the main information processing device MP and within its operating time zone. If it is the main information processing device MP and within its operating time zone, the process proceeds to step S42.

In step S42, the status of the self-processing device
File F₂State S of the self-processing device of _AAs the other party processing
Enables updating of the part that stores the device and information in duplicate
Set to “3”, which indicates the updatable state, and then step
Update that should be updated in the main information processing device by moving to S43
Accept the data and backup data accordingly
Update processing for updating the corresponding processing data in the storage area 4b
And then move to step S44 to update memory system.
Start the control device 6 and update data
Il F_Four, Then move to step S45,
Whether or not an operation start notification has been received from the master information processing device MP
If it is not received the operation start notification,
Returning to step S43, if the operation start notification is received
If so, the process proceeds to step S46.

In this step S46, "3" is set as the operating status S _B of the other processing device in the other processing device status file F ₁ indicating that the other processing device is being recovered. Then, the process proceeds to step S47, in which the recovery time update control device 7 is set. Upon activation, the update information stored in the update waiting data file F ₄ when the main information processing device MP is in an abnormal state is transmitted to the main information processing device MP, and then the process proceeds to step S48 to update the update data. It is determined whether or not the transmission is completed. When the data transmission is not completed, the process returns to step S47, and when the data transmission is completed, the process proceeds to step S49.

In this step S49, "0" representing the normal operating state is set as the operating state S _B of the partner processing device of the other processing device state file F ₁ , and then step S40.
Then, after transmitting a recovery completion notice to the main information processing unit MP, the abnormality detection interrupt process is terminated. Therefore, if it is assumed that the terminal device DT ₁₁ requests the information processing device P ₁ to update the information of the data D1, the data processing of the data D1 is performed by the main information processing device MP as shown in FIG. In the device P ₁ , the backup information processing device BP is set as the information processing device P ₂ , so that when the information processing devices P ₁ and P ₂ are both in the normal operating state, the information processing device P ₁ operates as shown in FIG. And the process of FIG. 8 is executed to execute the own data storage area 4 of the own data storage unit 4.
Update processing is performed on the data D1 stored in a, and when this update processing is completed, a data update request is issued to the backup information processing device P ₂ and the data is stored in the backup data storage area 4b. The update process is executed for the backup data of the data D1, and the data D1 stored in the _two information processing devices P ₁ and P ₂ at the remote location is necessary for the switching process when at least an abnormality occurs in the information processing device. Can be updated in real time within a short time.

However, as in the above, the terminal device DT₁₁Or
Information processing device P₁Request to update information of data D1 to
Information processing as the main information processing device MP when performing
Device P₁An abnormality has occurred in itself or in its data storage unit 4.
In this case, data cannot be updated in the main information processing unit MP.
Becomes Therefore, the terminal device DT₁₁Is set in advance
Other information processing device such as backup information processing
Information processing device P as a device₂The data D1
Make an information update request. Therefore, the information processing device P ₂Then
In the other processing device status monitoring unit 3, the information processing device P₁Abnormal condition
By detecting the state, the abnormality detection interrupt process of FIG.
Executed, other processor status file F₁Information processing
Information processing device P as device MP₁Operating status corresponding to
S_B“2” indicating an abnormal state is set in the
Device P₁Is his own information processing device P ₂Backup information
It is not the information processing device BP but the main information processing device MP.
Since it is within the operating hours, the procedure starts from step S32.
After step S41, the process proceeds to step S42
State file F₂Information processing device P₁Self-processing equipment for
Standing state S_ATo the main information processing device MP
Shows the updatable status that enables updating of the stored data
Set to "3", and the information as the main information processor MP
Processor P₁Accept the update data that should be updated in
Store data for backup of own data storage device 4
When the information update processing is performed on the data D1 in the area 4b,
In addition, the update data for the main information processing device MP is
Chi data file F_FourAccumulated in.

After that, when the abnormal state of the information processing apparatus P ₁ as the main information processing apparatus MP is recovered and restarted, the processing of FIG. 7 is executed at this time, but the previous processing is terminated. Since this is an abnormal end, the self-processing status file F ₂
The state S _A of the self-processing device with respect to the partner processing device of “0”
Has not been cleared to, for example, 2
If "3", which indicates the updatable state that enables updating of the portion that stores information heavily, is set, step S1
Then, the process proceeds to step S4 and the recovery process is performed.

Therefore, the information processing apparatus P ₁ sends an operation start notification to the processing apparatus P ₂ as the backup processing apparatus BP. The information processing apparatus P ₂ that has received the operation start notification, in the abnormality detection interrupt processing of FIG. 9, by moving from step S35 to step S36, other processing apparatus state S _B of the other processor state file F ₁
Is set to “3” indicating that recovery is being performed, and the update data stored in the update waiting data file F ₄ is sequentially processed while the information processing apparatus P ₁ as the main information processing apparatus MP is in an abnormal state. ₁ to update the data D1 in the self data storage area 4a of the information processing apparatus P ₁ .

When the transmission of the update data from the information processing apparatus P ₂ as the backup information processing apparatus BP to the information processing apparatus P ₁ as the main information processing apparatus MP is completed, the status of the other processing apparatus of the information processing apparatus P ₂ is changed. The other processing device state S _B corresponding to the information processing device P ₁ of the file F ₁ is set to “0” indicating the normal operation state, and a recovery completion notification is transmitted to the information processing device P ₁ .

The information processing device P _{1 which} has received the recovery completion notice receives information from the information processing device P _{2 which} has performed the data update process.
Is the backup information processing apparatus BP, the process proceeds to step S11 to update the information processing apparatus P ₂ of the own processing apparatus state S _A corresponding to the information processing apparatus P ₂ of the own processing apparatus state file F _2. Set to "3", which is possible.

Further, the information processing device P ₃ is also the information processing device P _3.
Since it is set as the backup information processing device for ₁ , the information processing device P ₃ also executes the same processing as the information processing device P ₂ for the data D2 to execute the backup data for the data 2 in the backup data storage area 4b. The update processing is performed, and the update processing at the time of recovery of the information processing apparatus P ₁ as the main information processing apparatus is executed.

Further, regarding the data D4, since the information processing device P ₃ becomes the main information processing device MP and the information processing device P ₁ becomes the backup information processing device BP, the information processing device as the backup information processing device BP. P
Main information processor MP while ₁ continues abnormal state
The information processing device P ₃ performs the update process of the data D 4, and the backup update data is accumulated in the update waiting data file F ₄ , the information processing device P ₁ recovers, and the information processing device P ₁ processes the information. At the time when the operation start notification is transmitted to the device P ₃ , the backup data update process is executed for the information processing device P ₁ .

Since the terminal devices DT _i1 and DT _i2 are provided with the information processing device selection connection function, the terminal device DT
Even if an abnormality occurs in the information processing device P _i to which _i1 and DT _i2 belong, the data update process can be performed by selectively connecting to another information processing device. As described above, according to the above-described embodiment, one of at least two information processing devices arranged at a remote place is set as the main information processing device MP, and the other is set as the backup information processing device BP. , Main information processor MP
The backup information processing device BP and the backup information processing device BP do not need to be arranged in parallel in one place, and the main information processing device MP and the backup information processing device BP perform backup data transfer between them and data update processing at the time of abnormality recovery. In other cases, the information processing devices can operate independently of each other, and the efficiency of use of the information processing devices can be significantly improved.

Further, the plurality of information processing apparatuses may include those which store only their own processing data and do not store other processing data for backup. Further, a plurality of information processing devices that store processing data for backup may be included. In the above embodiment, the case where there are three information processing devices has been described, but the present invention is not limited to this, and any number of information processing devices can be connected by a wide area network to One of the at least two information processing devices to be set as the main information processing device and the other as the backup information processing device.

Further, in the above embodiment, a hard disk device is applied as the data storage unit 4 of the information processing devices P _{1 to} P ₃ and the self data storage area 4a and the backup data storage area 4b are formed therein. However, the present invention is not limited to this, and the self-data storage area 4a and the backup data storage area 4b may be formed in separate arbitrary storage media.

[0048]

As described above, according to the backup method in the information processing system according to the first aspect, a plurality of processing devices distributed in a remote place are connected by a network and each processing device performs its own processing. First to store data
Data storage area and a second data storage area for storing processing data of another processing device are formed, and when the own processing data is held, it is stored in the first data storage area of its own and Since the data is stored as a backup in the second data storage area of the other processing device, even if an abnormality occurs due to a power failure or a disaster in one processing device, the other processing device in the remote place is affected by these. The backup data can be protected without fail.

According to the backup method in the information processing system of the second aspect, when an abnormality occurs in the processing device held in the second data storage area for backup, the abnormality processing device Since the update data transmission is suspended and the latest processing data is sent to the abnormally recovered processing device after the abnormal recovery, the backup data of the abnormally recovered processing device can be immediately recovered as regular backup data. The effect that the backup data can be accurately protected is obtained.

Further, according to the backup method in the information processing system of claim 3, when an abnormality occurs in the processing device, the other processing device holds its own processing data for backup from the processing device. Since the processing is transferred to, the effect that the backup data can be updated accurately even if an abnormality occurs in the main information processing apparatus is obtained.

[Brief description of drawings]

FIG. 1 is a system configuration diagram showing a system configuration in an embodiment of the present invention.

FIG. 2 is a schematic configuration diagram showing a specific configuration of an information processing device.

FIG. 3 is an explanatory diagram showing information location management information.

FIG. 4 is an explanatory diagram showing an arrangement relationship of respective data.

FIG. 5 is an explanatory diagram showing a storage table of another processing device status file.

FIG. 6 is an explanatory diagram showing a storage table of a self-processing device status file.

FIG. 7 is a flowchart illustrating an example of an information processing procedure of the information processing device.

FIG. 8 is a flowchart showing a subroutine process of information processing of the information processing device.

FIG. 9 is a flowchart showing an abnormality detection interrupt process of the information processing device.

[Explanation of symbols]

LAN _{1 to} LAN ₃ local area network L _{1 to} L ₃ transmission line T switching network P _{1 to} P ₃ information processing device DT _{11 to} DT ₃₂ terminal device 1 communication control device 2 controller 3 other processing device status monitoring unit F ₁ other processing Device status file F ₂ Self-processing device status file F ₄ Update waiting data file 4 Data storage device 4a Own data storage area 4b Backup data storage area 5 Access control device 6 Update storage control device 7 Update control device at recovery

Claims (3)

[Claims] 1. In an information processing system in which a plurality of processing devices distributed at remote locations are connected by a network, at least one of the processing devices has a data storage area for storing its own processing data and other processing. At least a data storage area for storing the processing data of the apparatus is provided, and each processing apparatus stores the processing data of the other processing apparatus together with its own processing data in the data storage area for backup. A backup method in an information processing system characterized by the above. 2. When an abnormality occurs in any one of the processing device and its data storage area, another processing device which holds its own processing data for backup in the data storage area of the processing device, 2. The backup method in the information processing system according to claim 1, wherein the transmission of the processing data to the abnormality generation processing device is interrupted, and after the abnormality recovery, the latest processing data is transmitted to the processing device that has recovered the abnormality. 3. The other processing device, when an abnormality occurs in one of the processing device that backed up its own processing data and its data storage area, causes the other processing device to perform its own processing. The backup method in the information processing system according to claim 1, wherein the backup is performed.