JPH11212846A - Data retreat restoration method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to have a processor of new version backup data, which are dealt with by a processor of old version, treated. SOLUTION: In retreating system processing SF, system information which a data base management system DBS manages respectively and data of a data base 2, these items and management information related to the SF, processing versions SV and DV of the DBS and the data base 2 are retreated as a backup file F. When each of the processing versions SV and DV of the backup file F, the present SF and a processing version of the DBS do not coincide with one another at the time of restoration, data version up processing prepared at the time of the version up is executed and the system information of the backup file F, the data of the data base 2 and the management information are converted into a data configuration which the DBS can deal with.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a data storage system in which, for example, a data file or a database is saved as backup data in a save area, and backup data in the save area is restored to a restore area as needed. It relates to the evacuation and restoration method.

[0002]

2. Description of the Related Art Conventionally, for example, backup data is backed up in a storage device as a backup file in a computer or the like, and the file data of the backup file in the storage device is restored in the computer. In the case where predetermined processing is performed on backup data, for example, in order to improve processing performance, a processing program that performs processing using the backup data is updated. Since the backup data has been processed by the processing program of the old version, some functions newly added to the processing program of the new version cannot be applied. for that reason,
In the new version of the processing program, the backup data that has been backed up is processed using only applicable functions.

Similarly, for example, when restoring data in a database that has been backed up, if the database management program that manages the database has been upgraded, the database that was backed up is replaced by an older version of the database management program. For example, the data format may be different between the new version of the database management program and the old version of the database management program, for example, and the new version of the database management program may handle the database that was backed up. For this reason, for example, processing such as creating a new database under the management of a new version of the database management program is performed.

[0004]

However, despite the version upgrade for the purpose of improving the performance of the processing program, a newly added function is used for data and the like formed in the old version. Therefore, there is a problem that a sufficient effect of the version upgrade cannot be obtained particularly for data in the old version that has been backed up. Further, the database handled by the old version cannot be handled by the new version, and it is necessary to create a new database, which is inconvenient.

Therefore, the present invention has been made in view of the above-mentioned conventional unsolved problem. Even when the processing program is upgraded after the backup, the backup program handled by the processing program before the version upgrade is used. It is another object of the present invention to provide a method for saving and restoring data that can be handled by a processing program after version upgrade.

[0006]

To achieve the above object, a method for saving and restoring data according to claim 1 of the present invention comprises:
A data save / restore method for saving backup data in a save area and restoring the backup data in the save area to a restore area, wherein the backup data is saved when the backup data is saved. The processing version of the data processing unit that performs handling at the time of evacuation is added to the backup data, and when the backup data of the evacuation area is restored, the backup version of the data processing unit attached to the backup data is used. Is compared with the current processing version of the data processing means, and when they do not match, the backup data in the save area is converted into a form that can be handled by the current data processing means. It is characterized by:

According to the first aspect of the invention, for example, backup data set in advance is saved in a predetermined save area, and this is restored in a restore area. At this time, the backup data is saved with the processing version of the data processing unit that handles the backup data at the time of saving added. When restoring the backup data in the save area, the processing version added to the backup data is compared with, for example, the current processing version of the data processing means stored in a predetermined storage area in advance. If they match, the backup data is restored as it is. On the other hand, when they do not match, for example, when a version upgrade of the data processing means is performed, a program for converting the backup data into a form that can be handled by the data processing means after the version upgrade is formed in advance according to the changed contents. By doing so, the backup data is converted into a form that can be handled by the current data processing means.

Therefore, the converted backup data is converted into a form that can be handled by the current data processing means. Thus, the data can be handled by the current data processing means.

A data backup / restore method according to claim 2 is a data backup / restore method in which a backup file comprising the backup data is formed, and the backup file is stored in the backup area. The backup file is provided with a file name including at least the processing version of the data processing unit when the data is saved.

According to the second aspect of the present invention, the backup data is saved as a backup file, and the backup file is given a file name including at least a processing version of the data processing means at the time of saving.

According to a third aspect of the present invention, in the data save / restore method according to the third aspect, the data conversion of the backup data is performed in such a manner that the conversion content to be converted in accordance with one version upgrade of the data processing unit is one unit. The data conversion is performed for each unit.

According to the third aspect of the present invention, the data conversion of the backup data is performed, for example, in such a manner that the backup data handled by the data processing means before the version upgrade can be handled by the data processing means after the version upgrade. By creating a conversion program to be converted to the data in advance every time the version is upgraded, by sequentially starting up the conversion program and performing data conversion, etc.
The conversion content to be converted in accordance with one version upgrade of the data processing means is defined as one unit, and data conversion is performed for each unit.

According to a fourth aspect of the present invention, in the data save / restore method, the data processing means includes: a system processing means for performing a predetermined system processing; and a database management means for managing a database. A data save / restore method for saving and restoring system information and database data managed by a processing means as backup data, wherein when the backup data is saved, the system processing means and the database management means When the backup processing version is added to the backup data and the backup data in the backup area is restored, the backup processing version of the system processing unit and the database management unit added to the backup data is added to the backup processing data. The system information and The respective data of the database, is characterized in that so as to convert the handling possible forms in the state of the system processing unit and the database management unit.

In the invention according to claim 4, the data processing means includes a system processing means for performing a predetermined system processing, and a database management means for managing a database, and executes the system processing. The system information managed by the system processing means, such as the data collected in step 1, and the data in the database are saved and restored as backup data.

At this time, the processing version of the system processing unit and the processing version of the database management unit when the backup data is saved are added to the backup data and saved. At the time of restoration, the processing version of the system processing unit and the database management unit are saved. Is compared with the current processing version of the system processing means and database management means. If they do not match, the system information and database data can be handled by the current system processing means and database management means. Is converted to a simple form.

Further, in the data backup / restore method according to claim 5, the backup data includes management information on the database held by the database management means, and restores the backup data in the backup area. In some cases, the management information is also converted into a form that can be handled by the current database management means.

In the invention according to claim 5, not only the data of the database saved as the backup data but also the database management means for managing the database, such as user management information or access right management information, are stored. Management information, that is, information related to the database is also saved as backup data. When restoring the backup data, not only the data in the database but also the management information related thereto is converted into a form that can be handled by the current database management means.

[0018]

Embodiments of the present invention will be described below. FIG. 1 shows a schematic configuration of a computer system to which a data save / restore method according to the present invention is applied. In a processing device 1, a database 2 formed in an external storage device or the like and a backup file stored in, for example, a disk A storage device 3 such as a device is connected. In the processing device 1, the database 2 is managed by the database management system (database management means) DBS, and a system processing (system processing means) SF for performing predetermined data processing or the like using data in the database 2 is executed. .

The database management system DBS writes / reads data to / from the database 2 and manages management information such as user management information or access right management information of a user who uses the database 2, for example.

In the system processing SF, for example, predetermined data processing is performed using data in the database 2. In addition, data specified in the process is collected, and the collected system information, data of the database 2 or management information of the database 2 is used as backup data,
A backup file composed of these data is formed, saved in the storage device 3, and the backup file saved in the storage device 3 is restored. Further, it manages files stored in the storage device 3.

When the backup data is saved in the storage device 3, first, the processing version of the system processing SF and the processing version of the database management system DBS are read. For example, when the system processing SF and the database management system DBS are incorporated in the processing apparatus 1 in advance, or when the system processing SF and the database management system DBS are upgraded, the versions thereof are set to predetermined predetermined values. This is performed by storing the information in a storage area and reading out from the storage area.

Then, as shown in FIG. 1, the system version SV, which is the processing version of the system processing SF,
(V1.2 in this case) and the database management system DBS
Database version DV, which is the processing version of
(In this case, V1.0), backup data BD including data in the database 2 and system information such as collected data collected in the system processing SF, and management information MD managed by the database management system DBS. Form a file F. The backup file F has a file name including the user name that created the backup file F, the date when the backup file F was created, and the processing versions SV and DV of the system processing SF and the database management system DBS. Give. Then, this is saved in the storage device 3.

As a result, the backup file F as shown in FIG. Next, when restoring the backup file F saved in the storage device 3 as described above, the processing device 1 performs processing according to the flowchart shown in FIG.

That is, first, in step S1, a work area for performing the version upgrade work is secured in a predetermined area of the processing device 1, and the backup file F stored in the storage device 3 is restored here. .

Next, the process proceeds to step S2, where the system version SV and the database version DV are read from the file data of the backup file F restored to the work area.

Next, the process proceeds to step S3, where the processing version of the current system processing SF and the processing version of the database management system DBS stored in a predetermined storage area of the processing device 1 in advance are read out, and the process proceeds to step S2 Then, it is determined whether or not each processing version SV, DV of the backup file F read at step S4 matches the current processing version.

If the processing versions match, the process proceeds to step S4, in which the backup data BD and management information MD restored in the work area are moved to a predetermined restoration area. After erasing the file data of the backup file F in the area, the restoration processing ends.

On the other hand, if it is determined in step S3 that the respective processing versions SV and DV of the backup file F do not match the respective processing versions of the processing apparatus 1 at the present time, the process proceeds to step S6 and the version-up processing is performed. Do.

In this version upgrade process, the backup file F is created among the plurality of data version upgrade processes that are created in advance and stored in the processing device 1 each time the system process SF and the database management system DBS are upgraded. This is performed by executing a data version upgrade process corresponding to the stored system version SV and database version DV.

This data upgrade process is formed for each system processing SF and database management system DBS. The data version upgrade process of the system process SF is a process program for converting system information handled in the system process SF before the version upgrade into a form that can be handled by the system process SF after the version upgrade. Is created each time the version is upgraded.

Similarly, the database management system DBS
Is a processing program for converting the data of the database 2 and the management information MD handled by the database management system DBS before the upgrade into a form that can be handled by the database management system DBS after the upgrade. Is created each time the database management system DBS is upgraded.

When the version upgrade process in step S6 is completed, the process proceeds to step S7, in which the system version SV and the database version DV of the backup file F are updated to the version after the data version upgrade process, and the backup file F is updated. Update the version of the file name of F. Then, the process returns to step S3.

Then, the processing of steps S6 and S7 is
Each processing version SV, DV of the backup file F
Are repeated until the current processing version of the processing device 1 matches.

Thus, every time the system processing SF or the database management system DBS is upgraded,
Each data conversion is performed on a changed part such as the format of the system information or the data of the database 2 and the management information due to one version upgrade, and the data conversion is performed once by repeating this. The data conversion accompanying the version upgrade is regarded as one unit, and is sequentially performed for each unit.

The processing for saving backup data and the processing for restoring backup data in the above embodiment are electronically stored as processing programs in a storage medium such as a ROM, a flexible disk, a compact disk, or a hard disk. The processing device 1 reads out a processing program from the storage medium and executes it.

Next, the operation of the above embodiment will be described.
Now, as shown in FIG. 1, the system version SV is V1.
2. Assuming that the system information and the database 2 are backed up in a state where the database version DV is V1.0, the backup data BD including the system version SV, the database version DV, the system information and the data of the database 2, and the backup data of the database 2 A backup file F including management information MD is formed, and the backup file F includes a user name, date, each processing version SV,
A file name consisting of a DV is given and saved in the storage device 3.

After the backup file F is formed, the system processing SF is upgraded, and when the system version SV is updated from V1.2 to V1.3, the system version SV is V1.2. A data version up process for converting the system information handled in the system processing SF at the time into a form that can be handled in the system process SF of the system version V1.3 is created, for example, in a predetermined storage area of the processing device 1. Store it.

Similarly, if the database management system DBS is upgraded after the backup file F is formed and the version is updated from V1.0 to V1.1, the database can be handled with the database version V1.0. A data version up process for converting the data of the database 2 and the management information MD related to the database 2 into a data format that can be handled by the database version V1.1 is formed, for example, in a predetermined storage area in the processing device 1. Store it.

Thereafter, every time the version of the processing system SF or the database management system DBS is upgraded,
A data version upgrade process for converting data handled before the version upgrade into a form that can be handled after the version upgrade is created and stored in a predetermined storage area.

Next, when restoring the backup file F saved in the storage device 3, a work area is first secured in a predetermined area in the processing device 1 as shown in FIG. Restored to working area. Then, the system version S of the backup file F
V and the database version DV are compared with the current system version and database version. In this case, since the processing version of the current system processing SF is V1.3 and the processing version of the database management system DBS is V1.1, the processing versions do not match.

Therefore, the version upgrade process of step S6 is executed according to the flowchart of FIG.
System version S in backup file F
Since V is V1.2, V1.2 system version S
The data version up process corresponding to V is selected and executed. That is, a data version upgrade process is performed to convert the system information that can be handled when the system processing SV is the processing version V1.2 to a data format that can be handled by the system processing SV of the processing version V1.3. You.

As a result, the system information corresponding to the system version V1.2 stored in the backup file F is converted into a data form that can be handled by the system processing SF of the system version V1.3. Converted to form. That is, the system version
It is converted into data in the same form as the system information generated in the V1.3 system processing SF. Then, the system version of the backup file F is updated from V1.2 to V1.3.

Then, the processing version of the current system processing SF is V1.3, and the system version SV of the backup file F matches the current processing version, so that the version upgrade processing for the system information ends.

Next, since the database version DV of the backup file F is V1.0, a data version upgrade process corresponding to the database version V1.0 is performed.
That is, when the database version is V1.0, the data and management information MD of the database 2 that can be handled by the database management
A process for converting to a data format corresponding to V1.1 is selected and executed.

Thus, the data of the database 2 stored in the backup file F and the management information MD
Is converted into a data form that can be handled by the database management system DV of the database version V1.1, and the data of the database 2 formed in the database management system DBS of the database version V1.1 is It is converted into data of the same form as the management information. And backup file F
Is updated from V1.0 to V1.1.

Here, the current processing version of the database management system DBS is V1.1, and the database version DV of the backup file F matches the current processing version. The version upgrade process ends.

If, for example, the current processing version of the database management system DBS is V1.2 and the database version DV of the converted backup file F does not match the current processing version, then the database version V1 Data upgrade process corresponding to .1, that is, the database version is V1.1
, Data and management information MD of the database 2 that could be handled by the database management process DBS
Is selected and converted to a data format corresponding to version V1.2. The same applies to the system processing SF, and the converted backup file F
Until the system version SV and the current processing version match, the data version-up processing is repeatedly performed, and the data conversion of the system information is performed.

Since both the system version SV and the database version DV match the current processing version, the converted system information and the database 2
Is moved to a predetermined restoration area, and the data in the work area is erased and cleared.

Therefore, the system information restored in the predetermined restoration area or the data and management information of the database 2 is data that can be handled by the current system processing SF or the database management system DBS. Even if the backup file F is the backup file F in which the data handled by the processing SF or the database management system DBS is saved, the current system processing SF or the database management system D
The BS can handle without any problem.

Therefore, the processing function of the system processing SF or the database management system DBS after the version upgrade can be effectively used. When the database 2 is backed up, not only the data of the database 2 but also the management information related to the database 2 held by the database management system DBS is backed up. There is no need to newly input management information when the data is restored, and the management information is also subjected to a data version upgrade process. Therefore, the management information that has been backed up is restored from the current database version DV. Even if the version is older, the database management system DBS can handle the management information without any inconvenience, and the restoring operation can be easily performed.

In the above-described embodiment, the system version SV and the database version DV are added to the file name of the backup file F. The system version SV and the database version DV corresponding to the data BD and the management information MD can be easily recognized.

In the above embodiment, a data version upgrade process is created each time a version upgrade is performed for the system processing SF and the database management system DBS, and data conversion accompanying the version upgrade is defined as one unit. Since the conversion of the backup data BD and the management information MD is sequentially performed for each unit, the processing version corresponding to the backup data BD or the management information MD stored in the backup file F is the initial processing version or the comparison. Regardless of the processing version, such as a new processing version, it is possible to reliably match the current processing version.

In the above embodiment, the case where the present invention is applied to a computer system having the database 2 has been described. However, the present invention is not limited to this, and information managed by the processing device 1 is backed up in the storage device 3. It is also possible to apply it to the computer system
The present invention can be applied to any computer system in which information managed by the processing device 1 is backed up in a predetermined save area.

In the above embodiment, the file name of the backup file F is the system version S.
V and database version DV,
The case where the system version SV and the database version DV are included as the file data of the backup file F has been described, but the system version SV is included only in the file name of the backup file F.
And database version DV,
The system version SV and the database version DV may be obtained from the file name of the backup file F in the process of step S2 of the restoration process in FIG.

[0055]

As described above, according to the first aspect of the present invention,
According to the data save / restore method according to the above, when saving the backup data, a save processing version of the data processing means for handling the backup data is added, and the saved backup data is saved. If the processing version added to the backup data does not match the current processing version of the data processing unit when restoring to the restoration area, the backup data is converted to a form that can be handled by the current data processing unit. Thus, even if the data processing unit is upgraded after the backup, the current data processing unit can handle the saved backup data without any change.

According to the data save / restore method of the present invention, a file name including the current processing version of the data processing means is given to a backup file composed of backup data. From the name, the processing version of the data processing means corresponding to the backup data can be easily recognized.

According to the data save / restore method according to the third aspect, since the data for backup is converted for each unit with data conversion accompanying one version upgrade as one unit, Regardless of the processing version corresponding to the data, the backup data can be surely converted into a data form that can be handled by the current data processing means.

According to the fourth aspect of the present invention, when saving the system information managed by the system processing means and the data of the database managed by the database management means, the system processing means and the database The processing version of the management means is backed up together with the backup data, and at the time of restoration, if the saved processing versions do not match the current processing versions of the system processing means and database management means, the current system processing means and database Since the saved system information and the data form of the database are converted so that the management means can handle them, the current processing version of the system processing means or the database management means is upgraded from the version at the time of evacuation. System Processing means, in the database management unit, the data of system information and databases have been saved, it can be handled without change any.

Further, according to the data saving and restoring method of claim 5, when saving the system information managed by the system processing means and the data of the database managed by the database managing means, the data is managed by the database managing means. When the management information is also saved and the system information and the data in the database are converted at the time of restoration, the management information is also converted into the data, so that the restoration work can be easily performed.

[Brief description of the drawings]

FIG. 1 is a configuration diagram illustrating an example of a computer system to which the present invention has been applied.

FIG. 2 is a flowchart illustrating an example of a processing procedure of the processing device 1 at the time of restoration.

FIG. 3 is an explanatory diagram for explaining the operation of the present invention;

[Explanation of symbols]

 1 processing device 2 database 3 storage device

Claims (5)

[Claims] 1. A data save / restore method for saving backup data in a save area and restoring the backup data in the save area to a restore area, wherein the backup data is saved when the backup data is saved. A processing version at the time of evacuation of the data processing means for handling the backup data is added to the backup data, and when restoring the backup data in the evacuation area, the data added to the backup data is restored. Compare the processing version of the processing means at the time of evacuation with the current processing version of the data processing means. If they do not match, the data for backup in the save area is converted into a form that can be handled by the current data processing means. Data save / restore method characterized by conversion 2. A method for saving and restoring data, wherein a backup file including the backup data is formed, and the backup file is saved in the save area. 2. The data backup / restore method according to claim 1, wherein a file name including a processing version at the time of backup is assigned. 3. The data conversion of the backup data is performed such that a conversion content to be converted in accordance with one version upgrade of the data processing unit is one unit, and the data conversion is performed for each unit. 3. The method according to claim 1, wherein the data is saved and restored. 4. The data processing means comprises: a system processing means for performing a preset system processing; and a database management means for managing a database, wherein system information and data of the database managed by the system processing means are provided. Save and restore as backup data, wherein when saving the backup data, the backup processing version of the system processing unit and the database management unit is added to the backup data. In addition, when restoring the backup data in the save area, the system information and the data in the database are respectively stored in accordance with the backup processing version of the system processing unit and the database management unit added to the backup data. The current situation 4. The data save / restore method according to claim 1, wherein the data is converted into a format that can be handled by the system processing means and the database management means. 5. The backup data includes management information relating to the database held by the database management means, and when restoring the backup data in the save area, the backup information also includes the current database. 5. The method according to claim 4, wherein the data is converted into a form that can be handled by the management unit.