JP2005293272A - Data management system, data management method, data management program, and file management program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To restore data into a state at the point of time a user desires with more certainty than usual. <P>SOLUTION: A computer 1 is provided with: a command detection part 102 for detecting a command to alter a file; a file duplication part 104 for backing up a file related to the command as a backup file each time the command is detected before it is altered on the basis of the command; a backup table 83 for storing a correspondence relationship between a storage place of the file and the backup file and a date and time of backup; a time of day and the like specification receiving part 201 for inputting specification information to show a date and time constitution of which the user desires to restore the file to; a file configuration discrimination part 202 for discriminating a configuration of the file at the date and time shown in the inputted specification information on the basis of the backup table 83; and a recovery execution part 205 for recovering the file on the basis of the discrimination result by the file configuration discrimination part 202 and any of the backup files corresponding to the file. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a system and a computer program for performing data backup or recovery.

  2. Description of the Related Art Conventionally, methods for restoring data to a state before the occurrence of a trouble have been proposed in order to cope with troubles such as occurrence of a failure or user's erroneous operation in a computer system.

  For example, a method called mirroring that writes the same data to a plurality of hard disks is widely known. According to this, even if one hard disk fails, data is stored in another hard disk, so that the reliability of data management can be improved.

Further, according to the method described in Patent Document 1, an updated file is periodically backed up and restored using a backup copy when a failure occurs.
Japanese Patent Laid-Open No. 11-134234

  However, in mirroring, when data is rewritten to contents not intended by the user due to an erroneous operation by the user, it cannot be restored.

  In the method described in Patent Document 1, the user can restore a file only to the state at the time of backup. Therefore, if it is found that the user has rewritten the contents of a file due to an erroneous operation, it is impossible to restore the file to the state immediately before the erroneous operation unless the backup timing coincides with that point. is there. Therefore, there are cases where restoration can be performed only to a file long before an erroneous operation is performed, and it is very inconvenient to edit the restored file while remembering how the data was created.

  The present invention has been made in view of such problems, and an object of the present invention is to make it possible to restore data to a state desired by a user more reliably than in the past.

  A data management system according to the present invention is a data management system for managing data stored in a storage medium, wherein a command detection means for detecting a command to change the data, and the command is detected. Each time, the backup unit backs up the data related to the command as backup data before being changed based on the command, the backup location of the backup data of the data and the data, and the backup date and time. Correspondence relation storage means for storing correspondence relation, designation input means for inputting designation information indicating to which date and time the user wants to restore the data, and the data at the date and time indicated by the inputted designation information Determining means for determining the configuration based on the correspondence relationship of the data, and the data Restoring based on either the backup data corresponding to the determination result and the data by the discrimination means, and having a data restoration unit.

  When the data is backed up in file units, the backup means generates the backup data of the data by changing a path of the data before being changed, and the data restoration means It is desirable to restore the data by changing the path of the backup data. As a result, the CPU overhead can be reduced.

  The data may be backed up in units of sectors. As a result, the size of the backup data can be reduced, and the processing time for generating the backup data can be shortened.

  In the present invention, “changing data” not only means updating the data such as so-called actual data and content portion of the file, but also relates to attributes such as the validity and path of the file used in the computer system. It also means updating data. Therefore, the process of moving, renaming, and deleting a file is also included in the meaning of “change data”.

  According to the present invention, data can be restored to a state desired by a user more reliably than in the past.

  According to the fourth and seventh aspects of the present invention, it is possible to acquire backup data and information necessary for restoring data to the state desired by the user. According to the ninth and tenth aspects of the invention, the time required for backup and recovery can be shortened. According to the invention of claim 10, the size of the backup can be reduced.

[First embodiment]
1 is a diagram illustrating an example of the overall configuration of the computer 1, FIG. 2 is a diagram illustrating an example of an internal configuration of the main body 11, and FIG. 3 is a diagram illustrating an example of a program installed in the hard disk drive 1d. 4 is a diagram illustrating an example of a file managed by the drive 30, and FIG. 5 is a diagram illustrating an example of a functional configuration of the computer 1.

  As shown in FIG. 1, the computer 1 includes a main body 11, a display 12, a keyboard 13, a mouse 14, and the like. As shown in FIG. 2, the main body 11 includes a CPU 1a, a RAM 1b, a ROM 1c, a hard disk drive 1d, and various interface cards 1e for connecting the main body 11 to other devices.

  As shown in FIG. 3, programs and various files such as an operating system (OS) 21, application software 22, disk driver 23, and data management software PG according to the present invention are installed in the hard disk drive 1d. These programs and files are loaded into the RAM 1b as necessary, and the programs are executed by the CPU 1a.

  The data management software PG is mainly composed of a file for the backup program PG1, a recovery program PG2, a file for storing information relating to settings, and a file for storing processing histories.

  The backup program PG1 includes modules for executing backup setting processing, command detection processing, backup necessity determination processing, backup processing, table update processing, capacity management processing, and the like. The recovery program PG2 includes modules for executing a time-specific designation input process, a file structure determination process, a file structure assembly process, a restored file display process, a recovery execution process, and the like.

  The backup program PG1 is for backing up data stored in the hard disk drive 1d or other hard disks or other storage media (for example, MO (Magneto Optical) disk, floppy disk, flash memory, etc.). . The recovery program PG2 is for restoring (recovering) data to past contents.

  Hereinafter, a case where a part or all of a file stored (saved) in the drive 30 as shown in FIG. 4 is protected will be described as an example. The drive 30 has a drive name (drive number) “C”, and a folder (directory) having folder names (directory names) “work1” to “work4”. Files having file names such as “fileA” and “fileB” are stored in the folders “work1” to “work4” or their subfolders (subdirectories). Hereinafter, files having file names “fileA”, “fileB”,... Will be referred to as “file FA”, “file FB”,. A solid-line rectangle indicates a file that has existed since the start of data management by the data management software PG, and a dotted-line rectangle indicates a file that has been newly added after the start of data management. The drive 30 may be a single storage medium such as a hard disk or MO (so-called physical drive), or may be a logical drive.

  By executing the backup program PG1, the recovery program PG2, and the like, the computer 1 includes a backup setting unit 101, a command detection unit 102, a backup necessity determination unit 103, a backup processing unit 104, and a table as shown in FIG. Functions such as an equal update unit 105, a capacity management unit 106, a time designation reception unit 201, a file configuration determination unit 202, a file configuration assembly unit 203, a restored file display unit 204, and a recovery execution unit 205 are realized. In the following, the contents of the processing of these units will be broadly described as backup processing and recovery processing.

〔backup〕
6 is a diagram showing an example of the protection target setting file 81, FIG. 7 is a diagram showing an example of the protection target setting file 81, and FIG. 8 is a diagram showing an example of the environment setting file 82. 9 is a diagram showing an example of file transition, FIG. 10 is a diagram showing an example of a backup file managed in the backup area, FIG. 11 is a diagram for explaining an example of a backup file generation and file update method, FIG. 12 is a diagram illustrating an example of the backup table 83.

  The backup setting unit 101 in FIG. 5 performs processing for setting related to backup in the following procedure. When the user performs a predetermined operation, the backup setting unit 101 displays a setting screen HG1 as shown in FIG. 6 on the display 12 (see FIG. 1).

  The user inputs and specifies the path of the file to be protected (that is, the folder name and file name indicating the storage location) in the text box TX11 of the setting screen HG1. By specifying a folder, a plurality of files under the folder can be specified together. In the text box TX12, a subfolder or a file under the folder specified in the text box TX11, which is to be excluded from protection, that is, an exception is specified.

  In the text box TX13, a location for storing the backup file of the file to be protected, that is, a backup destination folder or drive is designated. In the text box TX14, the total capacity of backup files that can be stored in the backup destination is designated.

  Based on the contents specified in the text boxes TX11 and TX12, the backup setting unit 101 generates a protection target setting file 81 including setting information 81a and 81b and a protection file table 81c as shown in FIG.

  The setting information 81a and 81b indicate the contents specified in the text boxes TX11 and TX12, respectively. The protection file table 81c indicates the protection target in units of files, and is obtained based on the setting information 81a and 81b. That is, it is obtained by excluding a file corresponding to the setting information 81b, that is, an exception, from all files corresponding to the setting information 81a. The “start date and time” and “attribute” will be described later.

  Further, the backup setting unit 101 generates an environment setting file 82 as shown in FIG. 8 based on the contents specified in the text boxes TX13 and TX14.

  When the user performs a predetermined operation, the computer 1 starts backup processing for protecting the file designated by the user. Then, the command detection unit 102 starts monitoring a command related to file control given from the operating system 21 to the disk driver 23. Then, a command to update the contents (content part) or attribute of the file (update command), a command to delete the file (delete command), and a command to create a new file (new command) ) Is detected.

  These instructions are given in the following cases, for example. When the user inputs a command of “overwrite” of a file while application software 22 such as a word processor or spreadsheet is activated, an update command is issued for the contents of the file. When the user inputs a command for downloading a file from an FTP server or the like, a new creation command for the file is issued. When the user inputs a command for deleting a file, a deletion command for the file is issued.

  Also, when the operating system 21 or the application software 22 generates, updates, or deletes a log file, an environment setting file, or the like, a new creation command, an update command, or a deletion command is issued. When moving a file to another folder, an attribute for the storage location (path) of the file is changed, so that an update command is issued.

  Depending on the specifications of the operating system 21 and the disk driver 23, the command detection unit 102 may detect only one command (command word). For example, the specification is such that the above-described update command, delete command, and new creation command can be performed by combining a command word such as “WRITE” and a parameter. In other words, for example, a file is deleted by writing (writing or changing) a value of “off” to a flag indicating validity in the attribute data of the file.

  When the command detection unit 102 detects a file update command, a deletion command, or a new creation command, the backup necessity determination unit 103 determines whether or not the file is a protection target in FIG. Based on 81, the determination is made.

  The backup processing unit 104 performs a process of copying (copying) and backing up a file according to the content of the command detected by the command detection unit 102 and the determination result of the backup necessity determination unit 103. Hereinafter, the processing contents of the backup necessity determination unit 103 and the backup processing unit 104 will be described by taking as an example a case where each file in the drive 30 of FIG. 4 has transitioned in the order shown in FIG.

  The date and time when data management is started (hereinafter simply referred to as “time”) is defined as time T0. 9, the configuration of each file FA, FB,... When data management is started, that is, the content portion and the state of the attributes are described as FA0, FB0,. FA1, FA2,... Are codes indicating the status of each update of the file FA.

  First, when an update command for a file FA is detected (circled numeral 1), the file FA is included in the protected file table 81c of FIG. 7, so the backup necessity determining unit 103 determines that the file FA is to be protected. Determine.

  At this time, the backup processing unit 104 generates a backup file by duplicating the file FA before update by the update command (that is, in the state of FA0), and the environment setting file 82 as shown in FIG. Save this to the backup destination indicated in. Hereinafter, the backup files of the files FA, FB,... Are described as “backup file BA”, “backup file BB”,.

  The backup file is given a file name in the format of ““ backup time ”+“ original file name ””. For example, the backup file BE of the file FE that was backed up at 10:15:37 on December 28, 2003 is given the file name “2003228101537fileE”.

  When a new creation command for the file FD is detected (circled number 2 in FIG. 9), the file FD is not included in the protected file table 81c, and therefore the backup necessity determining unit 103 determines that the file FD corresponds to the protection target. Is determined based on the setting information 81a and 81b. Since the file FD is stored under the folder “work2”, it is determined that it is a protection target. When a new creation command is detected, the backup processing unit 104 does not copy the file FD. However, when the file FD is updated in the future, the backup file BD of the file FD is generated and stored in the backup destination as in the case of the circled number 1.

  When an update command for the file FX is detected (circled numeral 3), the backup necessity determination unit 103 determines that the file FX is not protected based on the setting information 81a and 81b and the protection file table 81c. . In this case, the backup processing unit 104 does not perform replication processing.

  When a deletion command for the file FC is detected (circled numeral 4), the file FC is included in the protected file table 81c, and the backup necessity determining unit 103 determines that the file FC is a protection target. At this time, the backup processing unit 104 creates a backup file BC by duplicating the file FC before deletion, and stores it in the backup destination. The same processing is performed after the circled number 5.

  The backup file may be generated by a method as shown in FIG. In FIG. 11A, it is assumed that the file FA in the state of FA0 is loaded from the drive 30 to the RAM 1b (circle numeral 1). Then, it is assumed that the editing is performed by the application software 22 and updated to the state of FA1 (circle numeral 2).

  Here, when an overwrite save command is input and an update command is issued, the backup processing unit 104 in FIG. 5 performs the path (folder name and file name) of the file FA that is in the state of FA0 currently stored in the drive 30. ) Is changed to the folder name of the backup destination and the file name of the backup file BA (circle numeral 3). In this way, the backup file BA is generated by changing the path of the file FA before the update. Further, the data on the RAM 1b updated to the state of FA1 is stored in the drive 30 as the updated file FA (circled number 4).

  Further, in FIG. 11B, when a deletion instruction is given for the file FA, the backup processing unit 104 generates a backup file BA by changing the path of the file FA.

  Thus, the overhead of the CPU 1a (see FIG. 1) can be reduced by generating the backup file only by changing the path of the file before update or the file before deletion.

  The table updating unit 105 performs processing for updating the protection target setting file 81 and the backup table 83 based on the processing contents of the backup necessity determination unit 103 and the backup processing unit 104.

  As shown in FIG. 12, the backup table 83 stores information associating the protection target file with the backup destination of the backup file, the backup time, and the processing content. However, when a file to be protected is newly added as in the case of the circled number 2 in FIG. 9, information for associating the file with the added time and processing contents is stored.

  When a file to be protected is newly added, information indicating the storage location (path) of the file and the start time of protection (added time) is stored in the protected file table 81c of FIG. . When a file to be protected is deleted, this is recorded in the “attribute” field.

[Recovery (restoration, recovery)]
FIG. 13 is a diagram showing an example of the recovery designation input screen HG2, and FIG. 14 is a diagram showing an example of the confirmation screen HG3.

  5 displays a recovery designation input screen HG2 as shown in FIG. 13 on the display 12 (see FIG. 1). The user inputs in the text box TX21 and specifies at what time the file to be protected is to be restored (recovered).

  When the time designation receiving unit 201 receives the specified time, the file configuration determination unit 202 changes the configuration (contents) of each protection target file at that time to the protection target setting file 81 in FIG. 7 and the backup in FIG. The determination is made based on the information recorded in the table 83.

  For example, the file FA is updated at times T1 and T7 and backup processing is executed. When a time in the range of time T0 ≦ t <time T1 is specified, the file structure determination unit 202 determines that the content part (excluding the attribute) of the file FA is the backup file BA whose file name is “T1fileA”. It is determined that the content is the same as the content part. When the time in the range of time T1 ≦ t <time T7 is designated, it is determined that the content is the same as the content portion of the backup file BA having the file name “T7fileA”. Since no update or the like has been performed after time T7, when the time is designated, it is determined that the configuration (contents) is the same as that of the current file FA.

  The file configuration assembling unit 203 assembles a list of file configurations based on the determination result of the file configuration determining unit 202, the protection target setting file 81, and the environment setting file 82. Then, a list of files to be protected at the time designated in the text box TX21 is displayed as a protection target file list LT22 such as a Windows (registered trademark) Explorer or a file manager. However, when the file configuration determining unit 202 determines that the file has the same configuration (contents) as the current file, the color of the file name in the protection target file list LT22 is different from the file name of other files. The user is cautioned by displaying or marking a flag.

  When the user selects a file to be restored from the protection target file list LT22, the restoration file display unit 204 uses the backup file (see FIG. 10) stored in the backup destination to store the contents of the file in FIG. Is displayed as a confirmation screen HG3. For example, when displaying the time information in the range of time T0 ≦ t <time T1 for the file FA, the content part of the backup file BA of “D: \ backup \ T1fileA” is displayed in the “file contents” column. The transition history information relating to the file FA is extracted from the backup table 83 and displayed in the “history” column.

  The user looks at the confirmation screen HG3 and confirms whether the time designated on the recovery designation input screen HG2 matches the content he wants to restore. If not, or if you want to recheck by specifying another time, click the time in the history column of the confirmation screen HG3, or select the time on the history (highlighted) and click the redisplay button BN33 As a result, the contents of the file at that time are displayed again and confirmed.

  When the content to be restored is displayed on the confirmation screen HG3, the restore button BN31 is clicked. Then, the screen returns to the recovery designation input screen HG2 with the file at that time selected. Here, when the user clicks the designated file recovery button BN22, the recovery execution unit 205 restores the file selected on the confirmation screen HG3 so as to have the configuration determined by the file configuration determination unit 202. That is, the backup file of the file stored in the backup folder is copied to the storage area of the file. When the all recovery button BN21 is clicked, the recovery execution unit 205 restores all the files to be protected so as to have the configuration determined by the file configuration determination unit 202.

  However, at this time, there may be a case where the time designated in the text box TX21 on the recovery designation input screen HG2 and the time designated in the history column on the confirmation screen HG3 are different. In this case, the time specified in the history field on the confirmation screen HG3 is preferentially restored. Before restoration, it is desirable to display a message indicating that the specified time and the time to be restored are different from each other and to provide a means for selecting whether or not this is acceptable.

  On the other hand, when the user wants to confirm the past contents of another file, the user clicks the OK button BN32 on the confirmation screen HG3 and returns to the recovery designation input screen HG2. Here, the user re-specifies the time and file. During this time, the backup processing unit 104 or the like backs up the file. Therefore, it is possible to return to the state before the restoration process by designating a time slightly before the time when the restoration process is performed by the HG2 and clicking the all restoration button BN21.

  When the total data amount of the backup file stored in the backup destination folder or the like exceeds the backup size indicated in the environment setting file 82 in FIG. 8, the capacity management unit 106 is set to be within the backup size. Delete the old backup files in order. At this time, the user is inquired whether or not it can be deleted. Further, the contents of the backup table 83 are updated in accordance with the deletion.

  FIG. 15 is a flowchart for explaining an example of the processing flow of the computer 1 when the backup program PG1 is started. FIG. 16 is a flowchart for explaining an example of the processing flow of the computer 1 when the recovery program PG2 is started.

  Next, the processing procedure of the computer 1 in the first embodiment will be described with reference to the flowcharts of FIGS.

  When the backup program PG1 is activated, it accepts designation of a protection target file desired by the user and a backup destination of the file, and generates a protection target setting file 81 and an environment setting file 82 (see FIGS. 7 and 8). Update (# 11 in FIG. 15).

  When a command to update, add, or delete a file is detected (Yes in # 12 and # 13), it is determined whether or not the file is a protection target (# 14). If the file is protected and is about to be updated or deleted (Yes in # 15, Yes in # 16), a backup file of the file before update or deletion is generated and backed up to the backup destination (# 17). Further, the processing content of step # 17 is recorded in the backup table 83 (see FIG. 12) (# 18). If the file is a protection target and is about to be newly added (Yes in # 15, No in # 16), the fact that the protection target file has been newly added is recorded in the backup table 83 ( # 18).

  If the file is not a protection target (No in # 15), no backup process is performed for the file. While the backup program PG1 is running (No in # 19), the process returns to step # 12 to constantly monitor file updates and perform processing for backup.

  It is assumed that the user notices that the file has been rewritten to the contents not intended by the user or the file has been deleted due to some trouble. Therefore, the recovery program PG2 is activated to restore (recover) these files.

  Then, the computer 1 displays a recovery designation input screen HG2 as shown in FIG. 13, and accepts designation such as to which time (time) the file is to be restored (# 21 in FIG. 16). The contents of the file at the specified time are determined (# 22). A list of file configurations at the specified time (protection target file list LT22) is created and displayed based on the discrimination result (# 23).

  When a file to be restored is selected from the list (Yes in # 24), its contents and transition history are displayed as a confirmation screen HG3 as shown in FIG. 14 (# 25).

  When the user who has confirmed the confirmation screen HG3 clicks the restore button BN31 (Yes in # 26), a flag indicating that the file is a restoration target file is set (# 29). Then, on the recovery designation input screen HG2, the restoration point time (time finally designated by the user) is displayed after the file name of the file. If there is another file to be restored, it is selected on the recovery designation input screen HG2, and the content is confirmed on the confirmation screen HG3 (# 24 to # 26, # 29).

  When the selection is completed (Yes in # 27), the user clicks the all recovery button BN21 or the specified file recovery button BN22 from the screen of the recovery specification input screen HG2 in FIG. Then, the computer 1 restores all the files to be protected or the portion selected by the user using the respective back files (# 28).

  Since the backup program PG1 is still running during this time, the file update history by the restoration process in step # 23 is recorded and the file is backed up.

  According to the first embodiment, data can be restored to a state at an arbitrary time desired by the user. In addition, since the restoration state of the file can be confirmed on the confirmation screen HG3, the user can more surely know at which time point the restoration is desired.

[Second Embodiment]
FIG. 17 is a diagram showing an example of a program installed in the hard disk drive 1d in the second embodiment, FIG. 18 is a diagram showing an example of a functional configuration of the computer 1 in the second embodiment, and FIG. FIG. 20 is a diagram showing an example of the transition of the target file FA, FIG. 20 is a diagram showing an example of the configuration of the backup file BA, and FIG. 21 is a diagram showing an example of the backup table 84.

  In the first embodiment, data backup and recovery are performed in file units. In the second embodiment, data backup and recovery are performed in sector units.

  The hardware configuration of the computer 1 of the second embodiment is the same as that of the first embodiment shown in FIG. As shown in FIG. 17, programs and various files such as an operating system (OS) 21, application software 22, a disk driver 23, and data management software PG ′ according to the present invention are installed in the hard disk drive 1d. .

  The data management software PG 'is mainly composed of a backup program PG3, a recovery program PG4, a file for storing information relating to settings, and a file for storing processing histories.

  Further, the backup program PG3 includes modules for executing backup setting processing, command detection processing, backup necessity determination processing, backup processing, table update processing, capacity management processing, and the like. The recovery program PG4 includes modules for executing time and other designation input processing, file configuration determination processing, file configuration assembly processing, restored file display processing, recovery execution processing, and the like. The purposes of the backup program PG3 and the recovery program PG4 are the same as the purposes of the backup program PG1 and the recovery program PG2 of the first embodiment, respectively. However, there is a difference in processing contents. The following description will focus on differences from the first embodiment. Descriptions common to the first embodiment are omitted.

  By executing the backup program PG3 and the recovery program PG4, the computer 1 includes a backup setting unit 131, a command detection unit 132, a backup necessity determination unit 133, a backup processing unit 134, a table, and the like, as shown in FIG. Functions such as an update unit 135, a capacity management unit 136, a time designation reception unit 231, a file configuration determination unit 232, a file configuration assembly unit 233, a restored file display unit 234, a recovery execution unit 235, and the like are realized.

  The backup setting unit 131 performs processing for setting the protection target setting file 81 (see FIG. 7) and the environment setting file 82 (see FIG. 8), similarly to the backup setting unit 101 of FIG.

  The command detection unit 132 performs processing for monitoring a command related to file control given from the disk driver 23 to the drive 30. Then, a command for writing data into the sector of the drive 30 is detected.

  Then, the backup necessity determining unit 133 determines whether it is necessary to back up the data before writing the data to the sector based on the protection target setting file 81 (see FIG. 7). The backup processing unit 134 performs processing for backing up sector data according to the content of the command detected by the command detection unit 132 and the determination result of the backup necessity determination unit 133. Hereinafter, the processing content of the backup processing unit 134 will be described by taking as an example a case where the file FA determined to be protected transitions as shown in FIG.

  At the start of data management (time T0), the data constituting the file FA is divided and stored in sectors 101 to 107 of the drive 30 as in FA0. The “logical number” means the arrangement order of the data of the file FA on the file management table in the drive 30.

  When an instruction to write update data in the sector of “logical number = 3, sector number = 103” of the file FA is detected (circled number 1), the backup processing unit 134 sets the sector before the update to the file FA And change to a backup file BA as shown in FIG. That is, as a result, sector 103 is used by another file. Therefore, the update data is stored in another vacant sector (for example, sector 201), and “logical number = 3” is assigned to this sector.

  When only data (sector) is added to the file FA and data of any sector is not updated (circled number 2) as at time T2, the backup processing unit 134 generates a backup file. Absent.

  When a command to write an “invalid” flag in all sectors of the file FA, that is, a command to delete the file FA is detected (circled numeral 3), the file FA before deletion is shown in FIG. So that the backup file BA is changed. At this time, if the file FA is fragmented, defragmentation may be performed.

  If there is a newly added file, the backup file is not generated and the fact that the new file has been added to the backup table 84 and the addition time, etc., as in the first embodiment. Record.

  The table updating unit 135 performs processing for updating the protection target setting file 81 and the backup table 84 of FIG. 21 based on the processing contents of the backup necessity determination unit 133 and the backup processing unit 134. The process of updating the protection target setting file 81 is the same as that in the first embodiment.

  The backup table 84 is updated as follows. If the data of some sectors of the file has been updated (circled number 1 in FIG. 19), the backup destination of the file and the sector data before the update, the backup time, the logical number of each sector , And information that associates the processing contents. When a new sector is added to the file (circled number 2), information for associating the file with the added time, the logical number of the sector, and the processing content is recorded. When a file is deleted (circled numeral 3), information that associates the file with the backup destination of the backup file, the time when the backup was performed, the logical number of each sector, and the processing content is recorded.

  The time designation receiving unit 231 performs the same processing as the time designation receiving unit 201 in FIG. That is, the recovery designation input screen HG2 shown in FIG. 13 is displayed, and designation of which time the protected file is to be restored (recovered) is accepted.

  The file configuration determination unit 232 determines the configuration contents of each file to be protected at the specified time by tracing back the history information recorded in the backup table 84 of FIG.

  The file configuration assembling unit 233 displays a list of file configurations on the assembling protection target file list LT22 based on the determination result of the file configuration determining unit 232, the protection target setting file 81, and the environment setting file 82.

  Similar to the restored file display unit 204 in FIG. 5, the restored file display unit 234 displays the contents of the file restored by the file composition assembling unit 233 and the history of the transition of the file as a confirmation screen HG3 as shown in FIG. To do. The recovery execution unit 235 restores all the files to be protected so as to have the configuration content determined by the file configuration determination unit 232.

  The recovery execution unit 205 in FIG. 5 restores the file by copying and renaming the backup file to the folder where the original (original) file was, but the recovery execution unit 235 reassembles the data in units of sectors. Restore files with.

  The backup and recovery processing flow in the second embodiment is basically the same as the processing flow in the first embodiment shown in FIGS.

  According to the second embodiment, since data backup is performed in units of sectors, the size of the backup file can be made smaller than in the case of the first embodiment, and the disk capacity can be saved. In addition, the processing time for generating the backup file can be shortened.

  In the first and second embodiments, the data management software PG is configured by the two programs of the backup program PG1 and the recovery program PG2. However, both programs may be configured as one. Alternatively, the combination of modules may be changed and configured by three or more programs.

  In the first and second embodiments, as described with reference to FIG. 15 and the like, the data is backed up only when it is updated or deleted. It is desirable to back up the data at the time of starting the program PG1 and the newly added data. In addition, it is desirable not to back up to a disk in which the data is stored, but to back up to another disk or another computer on the network. When the hard disk drive 1d of the computer 1 crashes, restoration can be performed using a disk in which the backup file and the backup table 83 or 84 are stored in another computer in which the recovery program PG2 is installed.

  In the first and second embodiments, data backup is performed in file units and sector units, respectively, but the present invention can also be applied to backup in other data units.

  In addition, the configuration of the entire computer 1 or each unit, processing contents, processing order, and the like can be changed as appropriate in accordance with the spirit of the present invention.

  The present invention is particularly suitably used for backup and recovery of a disk storing a document file such as a document, chart, or drawing created or edited by a user or a source file of a program being created. .

It is a figure which shows the example of the whole structure of a computer. It is a figure which shows the example of the internal structure of a main body. It is a figure which shows the example of the program etc. which are installed in the hard disk drive. It is a figure which shows the example of the file managed by a drive. It is a figure which shows the example of a functional structure of a computer. It is a figure which shows the example of the figure protection target setting file which shows the example of a setting screen. It is a figure which shows the example of a protection object setting file. It is a figure which shows the example of an environment setting file. It is a figure which shows the example of a transition of a file. It is a figure which shows the example of the backup file managed in a backup area. It is a figure for demonstrating the example of the method of the production | generation of a backup file, and a file update. It is a figure which shows the example of a backup table. It is a figure which shows the example of a recovery designation | designated input screen. It is a figure which shows the example of a confirmation screen. It is a flowchart explaining the example of the flow of a computer's process at the time of starting of a backup program. It is a flowchart explaining the example of the process flow of the computer at the time of starting of a recovery program. It is a figure which shows examples, such as a program installed in the hard-disk drive in 2nd embodiment. It is a figure which shows the example of a functional structure of the computer in 2nd embodiment. It is a figure which shows the example of the transition of the file which is a protection object. It is a figure which shows the example of a structure of a backup file. It is a figure which shows the example of a backup table.

Explanation of symbols

1 Computer (data management system)
1d Hard disk drive (storage medium)
83, 84 Backup table (correspondence storage means)
102, 132 Command detection unit (command detection means)
104, 134 Backup processing unit (backup means)
201, 231 Time etc. designation reception part (designation input means)
202, 232 File configuration discrimination unit (discrimination means)
203, 233 File structure assembly unit (data restoration means)
205, 235 Recovery execution unit (data restoration means)
BA to BE backup file FA to FE file PG data management software (data management program)

Claims (10)

A data management system for managing data stored in a storage medium,
Command detecting means for detecting a command to change the data; and
Each time the command is detected, the backup unit backs up the data related to the command as backup data before being changed based on the command;
Correspondence storage means for storing the correspondence between the data and the backup location of the backup data and the date and time when the data was backed up;
Designation input means for inputting designation information indicating to which date and time the user wants to restore the data;
A discriminating means for discriminating the configuration of the data at the date and time indicated in the inputted designation information based on the correspondence relationship of the data;
Data restoration means for restoring the data based on a determination result by the determination means and any one of the backup data corresponding to the data;
A data management system comprising: A data management method for managing data stored in a storage medium,
Detecting a command to change the data;
Each time the command is detected, the data related to the command is backed up as backup data before being changed based on the command; and
Storing a correspondence relationship between the data and the backup location of the backup data and the date and time when the data was backed up in a correspondence relationship storage unit;
Inputting designation information indicating to which date and time the user wants to restore the data;
Determining the configuration of the data at the date and time indicated in the input designation information based on the correspondence of the data;
Restoring the data based on the result of determining the configuration of the data and any of the backup data corresponding to the data; and
A data management method characterized by comprising: A data management program used in a computer for managing data stored in a storage medium,
A change command detection process for detecting a command to change the data;
Each time a command to the effect of change is detected, the data related to the command is backed up as backup data before being changed based on the command; and
A correspondence storage process for storing the correspondence between the data and the backup location of the backup data of the data and the date and time when the data was backed up in a correspondence storage unit;
A data management program for causing a computer to execute A designation input process for entering designation information indicating to which date and time the user wants to restore the data;
A determination process for determining the configuration of the data at the date and time indicated in the input designation information based on the correspondence relationship of the data;
Causing the computer to execute a data restoration process for restoring the data based on a result of the determination process and any one of the backup data corresponding to the data;
The data management program according to claim 3. An initial backup process for backing up the data as backup data to a second storage medium other than the storage medium before starting the change command detection process;
An additional command detection process for detecting a command to add new data,
Each time an instruction to add is detected, additional data backup processing for backing up the data related to the instruction as backup data is executed by the computer,
In the backup process, the backup data is backed up to the second storage medium,
The data management program according to claim 4. A data management program used in a computer that manages one or more data stored in a predetermined area of a storage medium,
A change command detection process for detecting a command to change any of the data;
Each time a command to the effect of change is detected, the data related to the command is backed up as backup data before being changed based on the command; and
A correspondence storage process for storing the correspondence between the data and the backup location of the backup data of the data and the date and time when the data was backed up in a correspondence storage unit;
A designation input process for inputting designation information indicating to which date and time the user wants to restore the configuration of the predetermined area;
A determination process for determining the configuration of each data at the date and time indicated in the input designation information based on the correspondence information of each data;
A data restoration process for restoring each of the data based on the result of the determination process and any one of the backup data corresponding to the data;
A data management program for causing a computer to execute A file management program used in a computer for managing files stored in a storage medium,
A change command detection process for detecting a command to change data constituting the file; and
A backup process for storing the file related to the command as a backup file before being changed based on the command each time the command to be changed is detected;
A correspondence storage process for storing a correspondence relationship between the file and a storage location of the backup file of the file and a stored date and time in a correspondence storage unit;
Is executed by the computer. A designation input process for entering designation information indicating to which date and time the user wants to restore the file;
A determination process for determining the configuration of the file in the storage area on the date and time indicated by the input designation information based on the correspondence relationship of the file;
Restoring the file based on the result of the determination process and any one of the backup files corresponding to the file, causing the computer to execute a file restoration process;
The file management program according to claim 7. In the backup process, the backup file of the file is generated by changing the path of the file before being changed,
In the file restoration process, the file is restored by changing a path of the backup file of the file,
The file management program according to claim 8. A file management program used in a computer for managing files stored in a storage medium,
A change command detection process for detecting a command to change data of all or some of the sectors in which the file is stored; and
A backup process for storing data of all or part of the sector of the file related to the command as a backup file before being changed based on the command each time the command to be changed is detected;
Correspondence storage processing for storing the correspondence between the file and the storage location of the backup file of the file and the date and time when the file was stored in a correspondence storage unit;
A designation input process for entering designation information indicating to which date and time the user wants to restore the file;
A determination process for determining the configuration of the file in the storage area on the date and time indicated by the input designation information based on the correspondence relationship of the file;
A file restoration process for restoring the file based on a result of the determination process and any one of the backup files corresponding to the file;
Is executed by the computer.