JPH09282212A - Backup system for server file - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the reliability of data maintenance by preventing data under editing from being erased even when there is a network fault occurrence or file server down by holding server side application information and its edited data as backup on the client side. SOLUTION: When a network application 4 is actuated, file information and the information of an existent data file are acquired by an application state managing part 11, analyzed by an application judge processing part 10 and held in an information managing part A. Then, when there is a change in editing contents, the contents of the information managing part A are updated and a network fault is always monitored by a network connection monitor part 13. When any fault is detected, a network error processing part 12 performs forced network cancel processing, the data under editing are preserved as an editing file 7, that file is closed and at the same time, the preserved file name and state of the editing file 7 at the time of application end are stored.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of backing up a server file used by an application of a server operating on a network, and in particular, loss of file data being edited on the client side even when the server side goes down or a network failure occurs. The backup method that makes it possible to prevent

[0002]

2. Description of the Related Art In a network system in which a client on a network operates and processes an application on a server, the application itself exists on the server. Therefore, if the server goes down due to a network failure or the like, the client is inevitable. The application you are operating with will become inoperable and the data you are working on will be lost.

Conventionally, in order to minimize the number of man-hours required for backtracking due to the loss of data, it is necessary or necessary for a person to save data on a disk or tape frequently, or for an application to have a backup function, periodically or necessary. Every time it was automatically backed up. For example, in the invention described in Japanese Patent Application Laid-Open No. 5-61756 (Title of Invention: Data processing method of file server), the disk device in the file server has an original directory and a backup that need to be backed up. A directory for backup exists, and the backup directory is updated every time the original directory is updated. With this method, the backup directory is created in the same data format as the original directory, so if the original data is destroyed due to a network failure, you can easily re-register the backup data as the original. It is possible to recover. With this method, the user can proceed with work without having to be aware of data backup.

[0004]

However, the above-mentioned conventional artificial backup system has a drawback in that the user spends time for frequent backup work and the work efficiency is lowered. For example, when data that takes 5 seconds to back up is backed up at intervals of 5 minutes, if the work is performed for 1 hour, the editing work is interrupted 12 times, and the work for a total of 60 seconds is interrupted during that time. There was also the possibility of forgetting the backup work itself.

On the other hand, the automatic backup method of the above-mentioned publication has a drawback that the data for backup held in the file server cannot be used when the file server itself is destroyed.

[0006]

According to a first aspect of the invention, a client on a network reads an application on a server and a server file created by the application for each processing unit, and operates and processes the application on the client. In the backup method of the server file created by the application in the network system, the client saves the server file edit content by the application execution in a save file on the client when a network failure occurs, and restores the network failure at the time of recovery from the network failure. The application on the server reads the save file and restores the server file based on the contents of the save file.

In a second aspect of the present invention, the client according to the first aspect of the present invention includes a state management section A for storing a file format of the server file used by the application, a file name, and edit contents of the file. A state management unit B that stores a file name of the save file that saves the state of the application and the editing content stored in the state management unit A when a network failure occurs, When the server file is used, the edited contents of the server file are stored in the information management unit A, and when the network failure is recovered, the state of the application in the state management unit B and the saved file name are notified to the application on the server. Application judgment processing unit, A network error processing unit that monitors the network status and releases the connection between the client and the network when a fault in the network is detected, and the edited content in the information management unit A when the network connection is released as the save file. The present invention is characterized by including an application state management unit that stores the file name of the saved file and the ending state of the application in the information management unit B while saving and closing the save file.

Further, the third invention is characterized in that the network failure in the first invention includes a failure of the server.

The gist of the present invention is as follows. The client side holds the file edit content obtained by executing the network application. When a network failure is detected, the operation of the client computer is maintained by the means for forcibly releasing the network connection, and the edit file is closed even if the server is down. When a network application is started when the network is reconnected due to server recovery,
Read the edited file closed by the information from the client side from the network application,
Restore the data file to the latest data.

[0010]

Next, the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of a network system according to the present invention, FIG. 2 is a block diagram showing an embodiment of the present invention, and FIG. 3 is a network after the network application according to the present invention is activated. It is a flow chart which shows a processing procedure of data at the time of a failure.

In FIG. 1, 1 is a network such as a LAN, and 2 is a file server consisting of a network OS 5, a network application 4 operating on it, and an existing data file 3 created by the application. Reference numeral 6 denotes a client computer including a network OS 9, a network application data management device 8 operable on the network OS 9, and an edit file 7 created by the network application data management device.

Although not shown, the network application 4 and the existing data file 3 are loaded on the client side for each processing unit at the request of the client computer 6, and then the network application 4 edits the existing data file 3 on the client computer 6. I do. At this time, the network application data management device 8 has acquired the information of the network application 4 that has been started. When a network failure is detected, the network connection of the client computer is released, and the editing operation is temporarily continued on the client computer side. Then, the edit file 7 is closed.

FIG. 2 is a block diagram showing an embodiment of the present invention. The network application data management device 8 includes an application determination processing unit 10, an application status management unit 11, a network error processing unit 12,
It is composed of the network connection monitoring unit 13. The application status management unit 11 includes an information management unit A and an information management unit B.
Having.

FIG. 5 shows a configuration example of the information management section of the application information management section 11. The information management unit A stores and manages the file format, file name, and editing content of the existing data file 3 to be edited by the network application 4. The information management unit B stores and manages the save file name of the edit file 7 to be closed when a network failure occurs and the state of the network application 4.

In FIG. 2, the network application 4 loaded on the client computer 6
However, when the existing data file 3 is used, the file information is analyzed by the application determination processing unit 10, and the result is stored in the information management unit A of the application state management unit 11.

The network connection monitoring section 13 constantly monitors the network status, and when a failure is detected, the network error processing section 12 releases the network connection.
When the network connection is released, the application state management unit 11 saves the data being edited from the information of the information management unit A as the edit file 7, and closes the edit file 7. In addition, the application information management unit 11
The state at the end of the network application and the file name of the file saved as the edit file 7 are stored in the information management unit B.

In response to a request from the network application 4, the network application data management device 8 determines the information of the information management section B of the application data management section 11 by the application determination processing section 10, and determines the previous state of the application and the closed file. The network application 4 is notified of the file name of. The network application 4 acquires the edit file 7 based on the information obtained from the application state management unit 11, and restores the existing data file 3 to the latest state.

Next, the operation of the network application data management device 8 from the activation of the network application 4 on the client computer 6 to the occurrence of a network failure will be described with reference to the flowchart of FIG.

When the network application 4 is activated, the application status management section 11 acquires the file information of the application and the information of the existing data file (step 101). The acquired information is analyzed by the application determination processing unit 10 (step 10
2), the information management unit A of the application status management unit 11
(Step 103).

After the editing work is started (step 1
04) If there is a change in the edited content (step 105), the content of the information management unit A of the application status management unit 11 is updated (step 106).

During the editing work, the network connection monitoring unit 13 constantly monitors whether or not a network failure has occurred (step 107). When a network failure is detected, the network error processing unit 12 carries out the network forced release processing ( Step 108). Next, based on the information stored in the information management unit A of the application status management unit 11, the data being edited is saved as the edit file 7 and closed (step 109). At the same time, the saved file name of the edit file 7 and the state at the time of termination of the application are stored in the information management section B of the application state management section 11 (step 110).

Next, an embodiment for making the stored edit file 7 available to the application will be described with reference to the flow chart of FIG.

At startup (step 201), the network application 4 issues a command to the network application data management device 8 to inquire about the previous state (step 202). The network application data management device 8 judges the previous status of the inquired application by the application judgment processing unit 10 based on the information of the information management unit B of the application status management unit 11 (step 203),
Notify (step 204). If the previous state is that the file is not closed by the application itself, that is, the file is forcibly closed on the client side, the saved file name closed by the network application data management device 8 is sent to the network application 4 to the network application 4. Notice. The network application 4 determines whether or not there is a closed file (step 205), and if there is a closed file, acquires the contents of the saved file from the edit file 7 based on the saved file name and reflects it in the existing data file 3, The existing data file is restored to the latest data (step 206). The network application data management device 8 clears the information of the application status management unit (step 20) after notifying the network application of the information (step 204).
7).

As can be seen from the above example, when a network failure occurs, the latest data can be stored on the client computer side regardless of the state of the file server.

[0026]

As described above, according to the present invention, the client side can hold the server side application information and its edited data as a backup, so that a network failure occurs or a file server goes down. However, the data being edited can be saved and closed as a file on the client side, the data being edited is not lost, and there is an effect that reliability regarding data maintenance is improved.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a network system according to the present invention.

FIG. 2 is a block diagram showing one embodiment of the present invention.

FIG. 3 is a flow chart showing a data processing procedure when a network failure occurs after the network application is activated in the present invention.

FIG. 4 is a flowchart showing a processing procedure for restoring a data file to the latest data after a network failure occurs in the present invention.

FIG. 5 is a diagram showing a configuration example of an “application state management unit” in FIG.

[Explanation of symbols]

 1 Network 2 File Server 3 Existing Data File 4 Network Application 5 Network OS 6 Client Computer 7 Edit File 8 Network Application Data Management Device 9 Network OS 10 Application Judgment Processing Section 11 Application Status Management Section 12 Network Error Processing Section 13 Network Connection Monitoring Section

Claims (3)

[Claims] 1. A server created by an application in a network system in which a client on a network reads an application on a server and a server file created by the application for each processing unit, and operates and processes the application on the client. In the file backup method, the client saves the server file edit content by the application execution in a save file on the client when a network failure occurs, and the application on the server saves the save file when the network failure recovers. Is read out and the server file is restored based on the contents of the saved file. 2. The client includes a status management unit A that stores a file format and a file name of the server file used by the application, and edit contents of the file, and a status of the application and the status when the network failure occurs. A state management unit B that stores the file name of the save file that stores the edited content stored in the management unit A, and when the application uses the server file on the client, the edited content of the server file Is stored in the information management unit A, and at the time of recovery from the network failure, an application determination processing unit that notifies the application on the server of the state of the application and the saved file name in the state management unit B, and constantly monitors the network status. Shi Network Network error processing unit that disconnects the network and the client when a failure in the network is detected, and the edited content in the information management unit A is saved as the save file when the network connection is released. 2. The server file backup method according to claim 1, further comprising an application status management unit that closes and stores the file name of the save file and the status of the application at the time of termination. 3. The server file backup method according to claim 1, wherein the network failure includes a failure of the server.