KR20020065976A - Method for data backup using realtime monitoring of files and system therefor - Google Patents

Abstract

The present invention provides a data backup method and system through real-time monitoring of a file that detects a file change state in real time and records an identifier of a file whose state is changed, and then backs up only a file whose state has been changed using the identifier when performing a backup operation. It is about.

The file state detection unit detects a change of files in a file system in real time and transmits a file whose state change is detected to the change file storage unit. At this time, to reduce the load on the network, it is preferable to check whether the file is selected as a backup target and whether the file identifier has already been transmitted to the change file storage unit, so that only an identifier of a file to be backed up and not transmitted is preferably transmitted. . The change file storage unit stores the change file identifier continuously received. When the backup operation starts, the processing unit reads only files corresponding to file identifiers recorded in the change file storage unit from the file system and stores them in the backup data storage unit to complete the backup operation.

As a result, the time required for backup is greatly reduced, and the load on the backup system and the backup target system is significantly reduced.

Description

Method for data backup using realtime monitoring of files and system therefor}

The present invention relates to a method and a system for backing up data, and more particularly, to detect a file change state in real time, record an identifier of a file whose state is changed, and then perform only a file whose state is changed using the identifier when performing a backup operation. A method and system for backing up data are provided.

The conventional backup method is to back up all of the files designated by the user to back up, or to back up only the files whose status is changed by sequentially comparing the state of the files with respect to each of the backup target files. That is, when a backup execution command is issued automatically by a user's command or schedule, the backup program refers to a backup file list in which an identifier of a file selected as a backup target is stored, and a file corresponding to the identifier is previously performed at a previous backup time. It is determined whether or not it has been changed. If the file has been changed since the last backup time, the file is backed up. If there is no file change, the actual file data backup is not performed. Instead, the backup information of the file in the backup file list, for example, Update the backup time.

This conventional method has a disadvantage in that a large amount of time is taken during backup and a heavy load on the backup system is performed because the operation of comparing files is performed by the number of files in the backup file list at every backup.

The technical problem to be achieved by the present invention is to detect the change state of the file in real time to record the identifier of the file whose state is changed, and then to perform data backup through the real-time monitoring of the file to back up only the file whose state has been changed using the identifier The purpose is to provide a backup method and system.

1 is a block diagram illustrating a data backup method and system through real-time monitoring of a file according to the present invention.

2 is a flowchart illustrating a method of performing a backup using a data backup system through real-time monitoring of a file according to the present invention.

3 is a flowchart illustrating a process of detecting a state change of a file in real time and storing an identifier of a file whose state is changed in a change file storage unit.

4 is a flowchart illustrating a method of modifying temporarily stored data when contents of a backup job are changed.

<Explanation of symbols for the main parts of the drawings>

10 ... backup server part, 11 ... file status detection part

12 ... Temporary storage of transfer files, 13 ... file system

14 ... backup data storage, 15, 16 ... external system

101 processing unit, 102 changing file storage unit

103.Backup file storage

The present invention to achieve the above technical problem, in the method of performing a backup operation of the file, when at least one or more files to perform the backup is selected in real time to detect the state change of the selected file and the state Transmitting a change file identifier that identifies the changed file; Receiving and recording the change file identifier; And backing up only a file corresponding to the recorded change file identifier when performing a backup operation on the file selected for backup.

According to another aspect of the present invention, in order to achieve the above technical problem, in a system for performing a backup operation of a file, detecting a state change of a file selected for backup in real time and identifying a file whose state has been changed A file state detection unit for transmitting a change file identifier to perform a change; A change file storage unit for receiving a change file identifier from the file state detection unit and recording the change file identifier; And a processing unit performing a backup only for a file corresponding to a change file identifier recorded in the change file storage unit when performing a backup operation on the file selected for backup.

Hereinafter, the configuration and operation of a data backup method and system through real-time monitoring of a file according to preferred embodiments of the present invention will be described in detail.

1 is a block diagram illustrating a data backup method and system through real-time monitoring of a file according to the present invention. Referring to Figure 1, the data backup system of the present invention is installed in the backup server unit 10, the backup target system for processing the backup operation file state detection unit for detecting in real time the change state of the file system 13 ( 11), a temporary file transmission unit 12 for temporarily storing the information detected by the file state detection unit 11 and transmitted to the backup server unit 10, and a backup data storage unit for storing the data of the backup file ( 14). The backup server unit 10 includes a change file storage unit 102 for storing information received from the file state detection unit 11, a backup file storage unit 103 for storing a list of files to be backed up, and And a processing unit 101 for managing the change file storage unit 102, the backup file storage unit 103, and the backup data storage unit 14 and controlling the overall matters of the file backup.

Briefly describing the data backup method through the real-time monitoring of the file according to the present invention, the file state detection unit 11 detects the change of the files on the file system 13 in real time to save the change file of the changed file detected file It transmits to the part 102. At this time, in order to reduce the load on the network, it is checked whether the file is selected as a backup target and whether the identifier of the file has already been transmitted to the change file storage 102, so that only an identifier of a file which is a backup target and is not transmitted is transmitted. It is preferable to. The transmission file temporary storage unit 12 is used to store the transmitted file identifier and determine whether or not the previously changed file is transferred. The change file storage 102 stores the change file identifier continuously received. When the backup operation is started, the processing unit 101 reads only files corresponding to the file identifiers recorded in the change file storage unit 102 from the file system 13 and stores them in the backup data storage unit 14 to perform the backup operation. To complete.

The file state detection unit 11 is installed in a system that holds data to be backed up and detects a change (creation, deletion, update, etc.) related to a file in the file system 13. The file state detecting unit 11 may be used in any form as long as it can detect a state change of the file, but is preferably provided in the form of a resident program such as a driver or a daemon. When a file change is detected, the file state detecting unit 11 determines whether the file is a file stored in the backup file storing unit 103, that is, a file selected for backup by the user. When the changed file is a backup target file, the file state detecting unit 11 determines whether a change file identifier for identifying the file exists in the temporary file transfer file 12 and determines whether the change file identifier has been previously transmitted. To judge. If the change file identifier exists, this means that the change file identifier has already been transmitted and no further transmission is made. If a change file identifier does not exist, this means that a change to the file is first detected. Therefore, the change file identifier is transmitted to the change file storage unit 102, and the change file identifier is temporarily transmitted to indicate that the change file has been transmitted. Stored in the storage unit 12. By changing the file identifier only when a file change is detected for the first time and not transmitting the file change detected thereafter, the load on the network and the backup server can be reduced. Here, the change file identifier may use all the types of files that can be distinguished from each other and use a file name including a file path. The file state detection unit 11 receives the fact from the processing unit 101 when the backup is completed or the attributes of the backup job contents are changed, and deletes all the data stored in the temporary file storage unit 12 for the new backup job. Be prepared. In addition, when the backup target file is changed, that is, when the backup file identifier stored in the backup file storage unit 103 is deleted / added, the temporary file transfer unit deletes the changed file identifier of the file corresponding to the backup file identifier. Optimize the data size of (12).

The change file storage unit 102 receives the change file identifier from the file state detection unit 11 and stores the change file identifier. Generally, the system to be backed up is an external system (15, 16, ...) connected to the backup server 10 via a network, but the file existing in the data backup system in which the backup server 10 is installed as in the present embodiment. Also in the system 13, the file state detection unit 11 and the transfer file temporary storage unit 12 are provided to enable data backup according to the present invention. In addition, although it has been described as receiving directly from the file state detection unit 11 in receiving the change file identifier, it is too natural that the reception may be received through the processing unit 101. As a result, only the identifier of the file to be actually backed up in the backup file storage unit 102 exists. The change file storage unit 102 receives the fact from the processing unit 101 when the backup is completed or the attributes of the backup job contents are changed, and prepares for the new backup job by deleting all the stored data. In addition, when the backup target file is changed, that is, when the backup file identifier stored in the backup file storage unit 103 is deleted / added, the changed file storage unit may be deleted by deleting the changed file identifier of the file corresponding to the backup file identifier. Optimize the data size.

The backup file storage 103 stores a backup file identifier for identifying a file selected by the user to perform the backup. Here, the backup file identifier may use all types of uniquely distinguishable files, and like the change file identifier, it is preferable to use a file name including a file path. The backup file storage unit 103 also stores backup job information, that is, various information related to the backup job itself, such as the date and time at which the backup is performed and the backup cycle.

The processing unit 101 manages the file state detecting unit 11, the change file storing unit 102, and the backup file storing unit 103 described above, and controls the backup operation. When performing a backup operation according to a user's command or a scheduled schedule, read the change file identifiers stored in the change file storage unit 102, and read only the corresponding files from the file data 13 to backup data storage unit ( 14) back up. When the backup is completed, the processing unit 101 transmits the fact to the change file storage unit 102 and the file state detection unit 11 to delete all the stored data. Further, even when the backup job contents are changed, the processing unit 101 transmits the facts to the change file storage unit 102 and the file status detecting unit 11 to change the contents, that is, change the attributes of the backup job, and the backup target file. Depending on whether or not to change, as appropriate as described above.

Now, with reference to Figure 2 will be described in detail the data backup method through the real-time monitoring of the file according to the present invention. First, if a backup job is performed according to a user's command or a job schedule, it is determined whether the backup job is a new job (S21). If it is not a new job, that is, if a backup job is previously set, the change file identifiers are read from the change file storage unit 102 (S22). The change file identifiers are all identifiers of files whose contents have changed since the last backup operation, and the process of recording the change state of the file in real time in the change file storage 102 will be described in detail with reference to FIG. 3. Will be. The processing unit 101 reads out the file data corresponding to each of the read change file identifiers from the file system 13 (S23). The read file data is stored in the backup data storage unit 14 to perform backup (S24). When the backup is completed, the processing unit 101 transmits the backup completion fact to the change file storage unit 102 and the file state detection unit 11 so as to delete the stored change file identifier data (S25).

On the other hand, in the case of a new backup job in step S21, the user creates a new backup job and selects a file to perform the backup (S26). Thereafter, the backup file identifier for the file to be backed up is stored in the backup file storage unit 103 (S27), and the backup is performed for the file corresponding to the stored backup file identifier (S28).

3 is a flowchart illustrating a process of detecting a state change of a file in real time and storing an identifier of a file whose state is changed in the change file storage 102. Referring to FIG. 3, the file state detection unit 11 detects a file state change in the file system 13 in real time (S31). When a file whose state is changed is detected, it is determined whether the file is a file designated as a backup target by referring to the backup file identifier stored in the backup file storage unit 103 (S32). If the file is a backup target, it is checked whether a change file identifier for the file exists in the temporary file storage unit 12 (S33). If present, the modified file identifier of the file is already transmitted and is not sent again to prevent overloading the network and backup server. If the change file identifier does not exist in the transfer file temporary storage unit 12, this means that the fact of the state change for the file has never been transmitted. Therefore, the change file identifier is transmitted to the change file storage unit 102 and the change file identifier is transmitted. The transmission file is stored in the temporary storage unit 12 (S34). The change file storage unit 102 stores the received change file identifier (S35).

In the above-described backup method, since the change of the file is detected in real time and the information is stored, if the contents of the backup job designated by the user are changed, for example, the backup time is changed or the backup target file is added / When deleted, the stored information needs to be modified for the stored data. 3 is a flowchart illustrating a method of modifying the above-described information when the contents of the backup job are changed.

Referring to FIG. 4, it is first determined whether a property of a backup job is changed (S40). When the attribute is changed, the fact that the attribute of the backup job is changed is transmitted to the file state detection unit 11 and the change file storage unit 102 (S41), and the file state detection unit 11 and the change file storage unit 102 are changed. Deletes all the data stored in the temporary file storage unit 12 (S42). On the other hand, if the attributes of the backup file is not changed in step S40, it is determined whether the backup file identifier of the backup file storage unit 103 is changed, that is, whether the file selected as the backup target is added or deleted (S43). When the backup file identifier is changed, the file status detection unit 11 and the change file storage unit 102 transmit the backup file identifier of the changed file (S44), the file state detection unit 11 and the change file storage unit 102. In step S45, the transfer file temporary storage unit 12 deletes the changed file identifier corresponding to the received backup file identifier.

As described above, a data backup method and system through real-time monitoring of a file according to the present invention detects and records a change state of a file in real time, and then changes a file without comparing all files selected as backup targets at the time of performing a backup operation. Back up only. As a result, the time required for backup is greatly reduced, and the load on the backup system and the backup target system is significantly reduced. In addition, various information about the file to be backed up, for example, file name, number of files, file size, etc. can be known in advance before performing the backup operation, which provides more efficient scheduling for performing the backup operation.

Claims (11)

In a method of performing a backup operation of a file, when at least one file to be backed up is selected (a) detecting a state change of the selected file in real time and transmitting a change file identifier for identifying a file whose state has changed; (b) receiving and recording the changed file identifier; And and (c) backing up only files corresponding to the recorded change file identifiers when performing a backup operation on the file selected for backup. The method of claim 1, wherein a file to be backed up is not selected. (d) specifying at least one file to perform a backup to create a new backup job; (e) generating a backup list for storing backup file identifiers for the designated files, and recording the backup file identifiers in the backup list; And (f) performing a backup on the files corresponding to the backup file identifiers stored in the list. The method of claim 1, wherein step (a) (a1) determining whether the file whose status is changed is a file designated to perform a backup; (a2) if the file is a file designated to perform a backup, determining whether the change file identifier is transmitted for recording; And (a3) transmitting the change file identifier for recording if not transmitted, and temporarily storing the transmitted change file identifier; and a data backup method through real-time monitoring of a file. The method of claim 2, wherein the change file identifier corresponding to the backup file identifier temporarily stored in the step (a3) is deleted when the backup file identifier is added to or deleted from the backup list. 4. The method of claim 3, wherein the changed file identifier temporarily stored in the step (a3) is deleted when the property of the backup job is changed or the backup is completed. In a system that performs file backup, A file state detection unit for detecting a state change of a file selected for backup in real time and transmitting a change file identifier for identifying a file whose state has changed; A change file storage unit for receiving a change file identifier from the file state detection unit and recording the change file identifier; And And a processing unit performing a backup only for a file corresponding to a change file identifier recorded in the change file storage unit when performing a backup operation on a file selected to be backed up. The apparatus of claim 6, further comprising: a backup file storage unit for storing a backup file identifier for identifying a file selected for backup, wherein the processing unit performs at least one backup to be performed when a file to be backed up is not selected. Designating a file, storing a backup file identifier for the designated files in the backup file storage unit, and performing a backup on the files corresponding to the stored backup file identifier. 7. The data backup system of claim 6, further comprising: a temporary transfer file storing unit for temporarily storing a change file identifier transmitted from the file state detecting unit to the change file storing unit. The data backup system of claim 7, wherein the processing unit deletes a corresponding change file identifier from the transfer file temporary storage unit when a backup file identifier is added or deleted in the backup file storage unit. 10. The method of claim 8, wherein the file state detecting unit determines whether a change file identifier of the file exists in the temporary file storage unit when a file whose state is changed is detected, and only when the file does not exist, And transmitting to the change file storage. The data backup system of claim 8, wherein the transmission file temporary storage unit deletes all changed file identifiers stored when a property of a backup job is changed or the backup is completed.