JPH036753A - File saving system - Google Patents

Abstract

PURPOSE:To improve the availability of the file resources and at the same time to facilitate the control of a saved file by connecting the file saving store files to each other in a full saving and update saving states. CONSTITUTION:A file control information saving means 2 is provided together with a saving file deciding means 3, and a file data saving means 4. The relative position information included in a store file 71 for saved files is registered into a table 6. Then the file data saved previously into a store file 71 is rewritten with the file data to be saved this time in an update saving state after a full saving state. Thus the store file produced in the full saving state is connected to the store file produced in the update saving state for production of the file 71. As a result, just a single file 71 that is produced in the full saving state is required to each user. Thus the duplication of file data is eliminated and the file resources can be effectively used. At the same time, the files 71 are easily controlled.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a file saving method in an information processing system using a computer, and in particular, after all files have been saved once, only updated files are saved. This relates to a file saving method for saving.

[Prior Art] In information processing systems using electronic computers, files are evacuated at a predetermined time to a storage file device different from the data file device in which the files are stored, in order to back up user files in case of a failure. That's what I do. In addition, in this type of file saving method, all files stored in the data file device are temporarily saved to the storage file device (all save), and then only files that have been updated are saved (update save). is taking.

Furthermore, in the conventional file saving method, a storage file for saving files is secured separately for all backups and update backups, and a storage file is secured and saved each time a file is saved. .

[Problem to be solved by the invention]

As mentioned above, in the conventional file saving method, a separate storage file for saving files was secured and saved, which had the following drawbacks: - A new storage file had to be prepared every time an update was saved. File resources are required each time.

■The contents of the files to be updated and saved are mostly the same as the contents of the files saved at the time of full backup and the files saved in the previous update and save, and there are files with similar images. File resources are being used unnecessarily.

(i) Since there are i number of stored files, their management becomes complicated.

The present invention has been proposed in view of the above points, and its purpose is to provide a file saving method that allows effective use of file resources and enables efficient management of saved files. There is a particular thing.

[Means to solve the problem]

In order to achieve the above object, the present invention uses a file saving method in which all files stored in a data file device are saved to the storage file device, and then updates are saved for updated files. After reading the management information into the evacuation file table and securing the storage file in the storage file device when all evacuation is performed, and after calling and executing the evacuation file determination means during update evacuation, the file management information registered in the evacuation file table is stored. A file management information saving means that saves the location information of the saved file management information to a file and registers it in the storage file table; and a file update date and time that is called by the file management information saving means and is held in the read file management information. By comparing the creation date and time of the storage file held in the storage file table, it is determined whether the file has been updated since the last backup, and the file management information of the file to be saved is left in the backup file table. The save file determination means refers to the file management information registered in the save file table and the position information of the saved file in the storage file held in the storage file table, and saves the file from the data file device to the storage file device. A file data saving means is provided for replacing or adding file data of a file to be saved to a storage file.

[Effect]

In the file saving method of the present invention, the file management information saving means reads the file management information from the data file device into the saving file table, secures the storage file in the storage file device at the time of all saving, and then saves the saved file at the time of update saving. After calling and executing the determination means,
The file management information registered in the save file table is saved to a storage file, the location information of the saved file management information is registered in the storage file table, and the save file determination means is called by the file management information save means and starts operating. Then, by comparing the file update date and time held in the loaded file management information and the creation date and time of the storage file held in the storage file table, it is determined whether the file has been updated since the last backup. The file management information of the file to be saved is left in the evacuation file table, and the file data evacuation method saves the file management information registered in the evacuation file table and the storage file of the evacuated file held in the storage file table. The file data of the file to be saved is saved by 1m or additionally from the data file device to the storage file of the storage file device by referring to the position information at .

〔Example] Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the file saving method of the present invention. In FIG. 1, a data file device f is a device in which user files are stored, and the user files are stored as file management information 11 and a plurality of file data 12. In addition, the storage file device W7
is a device for saving files, and a plurality of storage files 71 are formed inside.

On the other hand, the 41JD section of this embodiment is composed of a file management information saving means 2, a saving file determining means 3, and a file data saving means 4, and a saving file table 5 and a storage file table 6 are used for executing each of the above means. This is a table that holds necessary information. The functions of each means are as follows.

File management information saving means 2; reads the file management information 11 from the data file device 1 into the saving file table 5, secures the storage file 71 in the storage file device 7 when saving all data, and calls the saving file determining means 3 when saving updates. After execution, the file management information registered in the save file table 5 is saved to the storage file 71.
A function to save the file management information to the storage file table 6 and register the location information of the saved file management information in the stored file table 6.

Save file determination means 3: File management information save means 2
The file update date and time held in the file management information 11 read into the save file table 5 by the file management information save means 2 and the creation date and time of the storage file 71 held in the storage file table 6 are called and operated. By comparing the previous 1JAi! ! A function that determines whether a file has been updated since then and leaves file management information of the file to be saved in the save file table 5.

File data saving means 4; file management information registered in the saving file table 5 and storage file table 6
Storage file 7 for saved files held in
A function to replace or add file data 12 of a file to be saved from the data file device I to the storage file 71 of the storage file device 7 and save the file data 12 by referring to the position information within the data file device I.

FIG. 2 is a diagram showing the relationship between the file management information 11 and file data 12 in the data file device 1 in FIG. That is, a plurality of user identifiers 13 are provided in the file management information 11 in order to manage files for each user, and a plurality of file descriptors 14 are connected to this user identifier 13, and each file descriptor 14 is It points to the corresponding file data 12. In the figure, three user files exist for user identifier A, and their file descriptors F2. F2. F3 is file data D
1. D2. It shows a state pointing to D3. In addition,
The file descriptor 14 stores a file name 15 which is a file identifier, a creation date and time 16, an update date and time 17, file attributes 18 indicating file organization, file size, etc., and corresponding file data 12. A file data address 19 indicating position information on the data file device 1 is included.

FIG. 3 is a diagram showing the format of the storage file 71 secured on the storage file device 7 and the storage file end IJ 61 registered on the storage file table 6 in FIG. That is, the storage file 71 has a file description information section 72 and a file data section 73, and the file description information section 72 contains a user identifier and a file management information of the data file device 1. The file descriptor of the saved file is stored around save 1. Further, the file data section 73 is provided with a file header 74 and file data 75 corresponding to each saved file, and the file data 12 of the saved file is stored in the file data 75.
It is designed to be stored in . Note that the file header 74 includes a file name 76 and a file data address 77 indicating the relative position of the file data 75 within the storage file 7I.

On the other hand, in FIG. 3, the storage file entry 61 is
It has a user identifier at the beginning, a creation date and time 63 of the storage file 71, and a storage file address 64 indicating the position information of the storage file 71 on the storage file device 7,
After that, a save file entry 62 corresponding to each file data 12 is provided. Note that the save file entry 62 includes a file name 65 and a storage file 71.
The file descriptor address 66 indicates the position of the file descriptor within the file descriptor, and the file header address 67 indicates the position of the file header 74.

For example, in FIG. 3, the file descriptor address 66 in the save file entry 62 with file name a points to the position of the file descriptor F1 stored in the file description information section 72, and the file header address 67 points to the file data It points to the position of the file header DHI in the section 73.

Next, the operation of the above embodiment will be explained with reference to the flowchart shown in FIG.

In the file saving method of the present invention, first, all the file data 12 pointed to by the file descriptor 14 connected to the user identifier 13 of the file management information 11 is saved, and then the file is not updated since the previous saving. Repeatedly perform update backup to save only the files that have been updated. Therefore, we will first explain the entire save that is performed prior to the update save. Note that, as an example, a file descriptor Fl having file names a, b, and c under the user identifier A.

F2. F3 exists and the file data D1.F3 is pointed to by it. D2. Assume that D3 is to be evacuated.

First, the file management information saving means 2 reads the file management information 11 from the data file device 1, and stores a plurality of file descriptors 14 (Fl, F2, F3) connected to the user identifier 13(A) in the save file table. 5 (step 201).

Next, it is determined whether or not to completely evacuate (step 202).
), proceed to the yes side as it is now a complete evacuation.

Then, read file descriptor 14 (FIF2.F
3), and file data 12.
(DI, D2.D3), grasp the size of the storage file 71 required for evacuation, secure the storage file 71 on the storage file device 7, and create the storage file entry 61 on the storage file table 6. create and
The user identifier 13(A), creation date and time 63, and storage file address 64 are registered (step 203).

Next, it is determined whether or not processing has been completed for all file descriptors (step 204), but since the processing has just begun, the process naturally goes to the "no" side. Next, it is determined whether or not the save file entry 62 exists (step 205), but since the entire process has not yet been saved, the process naturally goes to the "no" side.

Then, the file descriptor (
Fl) is written to the file description information section 72 of the storage file 71 that has already been secured (step 206), and then a backup file entry 62 is created for the file name (a) of the file to be saved this time in the storage file entry 61. Storage file 7 in which the file descriptor (Fl) was written
1 is registered as its file descriptor address 66 (step 207).

Other file descriptors (F2.F
By repeating the process for 3), the file management information 911 means 2 completes the process.

With the above processing, the entire saving process of the file management information 11 by the file management information saving means 2 is completed, and the file description information part 72 of the l file 71! This file descriptor (
Fl, F2. F3) is saved, and a saved file entry 62 with the corresponding file name (a, b, c) is created in the stored file entry 61.

Next, control is passed to the file data saving means 4, and the saving process of the file data 12 is performed.

First, the file data saving means 4 determines whether or not processing has been completed for all file descriptors (step 401), but since the processing has just begun, it is natural that n
Go to o's side.

Then, the file data saving means 4 uses the file data address 19 of the first file descriptor 1 = 1 (Fl) on the saving file table 5 to save the file (
The storage location of file data 12 (DI) with file name a) is set to E'2 m, and the file data 12 (DI) is
(Step 402).

Next, it is determined whether or not the node address 67 exists in the file at the save file end IJ 62 (step
Step 403), since the file data section 73 has not yet been stored, the process goes to the "no" side.

Then, the file data address 77, which is the position in the storage file 71 where the file data 12 (DI) is saved, is calculated, and from the file name 76 (a> and the file data address 77), the data 74 (DHI )
Step 404 to create the file data 75 (
Dl) Otsuko(・shikari) and writes it to the file data section 73 (step 405).

Subsequently, the location information where the check 74 (DHl) is written to the file is entered into the file header address 67 of the save file entry 62 corresponding to the file name a in the storage file entry 61 (step 406).

The processing of steps 104 to 406 above is performed by saving other file descriptors 14 (F2 F3
), the file data saving means 4 ends the process.

Through the above processing, the entire saving process of the file data 12 by the file data saving means 4 is completed, and the file data (DI,
D2. D3) are file headers (D)II and DH2, respectively.
, DH3), and each file header (DHI, DH
2D H3) is entered.

Next, update saving processing for saving only files that have been updated after saving will be described. As an example, the file data D1 and D2 in the above example have been updated since the last file save, and the file descriptor FI'
, F2' and file data DI', D2'.

The file management information saving means 2 saves a plurality of file descriptors under the user identifier 13 + 4 (Fl",
F2', F3) are read into the save file table 5 (step 201). Next, it is determined whether or not to save all data (step 202), but since this time it is an update save, n
The process advances to the side o, and the process shifts to the process of the save file determining means 3.

The save file determining means 3 determines whether processing has been completed for all file descriptors (step 30).
1), since we have just started the process, we naturally go to the no side.

Then, the update date and time 17 of the file descriptor 14 read into the save file table 5 and the user identifier 13 (
Compare the creation date and time 63 in the storage file entry 61 in the storage file table 6 identified in A) to determine whether the file has been updated since the previous file backup (steps 302 and 303). .

Here, if the update has been performed, go to the yes side and return to step 301; if the update has not been done, go to the no side and save the file descriptor 14 to the save file table 5. Step 304)
, only the file 3 self-descriptor 14 of the updated file is left in the iJA evacuation file table 5. In this example, the file descriptor F corresponding to the file being updated
Only l' and F2° are left on the iJA evacuation file table 5.

After performing the above processing on all file descriptors 14, control is returned to the file management information saving means 2.

The file management information saving means 2 judges whether or not the processing has ended for all file descriptors (step 204), but since the processing has just started, it naturally goes to the "no" side.Subsequently, the saving file entry 62 exists (step 205), but since this is update saving, a save file entry already exists except when a file is added, so the process goes to the yesO side.

Then, referring to the file descriptor 14 (Fl') remaining on the save file table 5, the file name 15 is
(a), obtain the file descriptor address 66 from the save file entry 62 of the save file entry 61, and use the file descriptor 14 (Fl'') read into the save file table 5 to obtain the file description information of the save file 71. 110 with the file descriptor (Fl) of section 72 (step 208).
The same process is repeated for F2').

Although this assumption does not apply, if the save file entry 62 does not exist, it is assumed that the file has been added since the last save, and the file is saved to the file description information section 72 of the storage file 71 in the same way as when saving all files. Add and write the file descriptor 14 on the file table 5 (step 206), then create a save file entry 62, and register the file descriptor 14 as the file descriptor address 66. (Step 20
7).

As described above, when all of the file descriptors 14 left as those to be saved on the save file table 5 have been replaced/added, the file management information save means 2 finishes the update save process of the file descriptors 14. do.

Next, control is passed to the file data saving means 4, and update saving processing of the file data 12 is performed.

The file data saving means 4 determines whether or not processing has been completed for all file descriptors (step 4).
01), since the process has just started, it naturally goes to the no side.

Then, file descriptor 1 on the save file table 5
4 (Fl') and read file data 12 (DI') in the same way as when saving all files (step 402).
.

Next, it is determined whether or not the file address 67 exists in the save file entry 62 (step 4).
03) Since this is an update save, the file header address 67 already exists except when a file is added, so proceed to the yes side.

Then, the storage file entry 61 is searched to find the save file entry 62 with the same file name (a), the node address 67 to the file is obtained, and the file header 74 (DHl) is read from the storage file 71 (step 407).

Then, the size of the stored file data 75 (Di) is obtained from the file data address 77 in the read file header 74 (DHl), and compared with the size of the file data 12 (DI) read this time, the expanded file (Step 4)
08). Then, file data 12 (D
io) is the same or smaller, the process goes to the no side, and the file data 15 (DI
).

On the other hand, the read file data 12 (for example, D2
) is larger than the file data (D2) stored in the file data section 73, WIA is performed on the file data 75 (D2a) by that size using the file data 12 (D2'), and the file data (02'') is )
The expanded portion is written as file data (D2b) after the last block of the file data section 73 (step 410). Then, the file data address 77 for the file data (D2b) written after block i18 is set to file henotaf4 (D11
2) (step 411).

Also, in this assumption, AM does not apply, but when the file address 67 is not registered to the file in the save file entry 62, it is assumed that a file has been added, and the file data 12 is added (step 404) in the same way as when saving all files. ~40
Do 6).

The file data saving means 4 performs the above processing on all the file descriptors 14 in the saving file table 5, thereby completing the update saving process of the file data 12.

Subsequent updates and retreats are performed in the same manner.

[Effects of the Invention] As explained above, in the file saving method of the present invention, the relative position information of the saved file within the storage file is registered in a table, and when updating and saving after all saving, By replacing the file data saved in the storage file in the previous save with the file data to be saved this time, the storage file created in Step 1 and the storage file created in the update save are stored in a combined form. Because the file is created, the only storage file required for file backup is the one that was created when all files were saved for each user, eliminating duplication of file data and making effective use of file resources. At the same time, there is an effect that management of stored files becomes easier.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing an embodiment of the file saving method of the present invention, Fig. 2 is a diagram showing the relationship between file management information and file data, and Fig. 3 is a detailed diagram of stored files and stored file entries. , FIG. 4 is a flowchart showing the processing of the embodiment. In the figure, 1...Data file device 11...File management information 12...File data 2...File management information saving means 3...
Save file determination means 4... File data save means 5... Save file table 6... Storage file table 61... Storage file entry 7... Storage file Device 71: Storage file

Claims (1)

[Claims] In a file saving method that saves all files stored in a data file device to a storage file device, and then saves updated files, file management information is transferred from the data file device to a save file. After loading the file into the table and securing the storage file in the storage file device when saving all files, and calling and executing the saving file determination means when saving an update, saves the file management information registered in the saving file table to the storage file, A file management information saving means that registers the location information of the saved file management information in the stored file table, and a file update date and time called by the file management information saving means and stored in the read file management information and stored in the stored file table. evacuation file determination means that determines whether the file has been updated since the previous evacuation by comparing the creation date and time of the stored file that has been saved, and leaves file management information of the file to be evacuation in an evacuation file table; , refers to the file management information registered in the evacuation file table and the position information of the evacuated file in the storage file held in the storage file table, and saves the file from the data file device to the storage file of the storage file device. 1. A file saving method, comprising: file data saving means for replacing or adding file data of a file to be saved.