JP2010146038A - File preservation method in nas device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a data preservation method for permitting the usage of past data by the operation of a general user him/herself without receiving the conventional restriction of the number of preservation generations and the interval of preservation in a NAS device. <P>SOLUTION: The file updating monitoring module of the NAS device monitors the updating (overwriting processing) of a file from a client device by a user operation, and then, the file before updating is automatically preserved with a different file name. Thus, the past data to be operated by the user him/herself is preserved. The present invention permits the preservation of the past data to be operated by the user him/herself in the NAS device. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  In the NAS device that is accessed from the client device via the network, all update file histories are stored regardless of the number of storage generations or the storage time interval.

  Conventionally, as a means of protecting the update data of files stored on NAS devices, the user can save the file name as a different file name by attaching a revision number to the file name, or the volume shadow copy function of Windows (registered trademark) It has been performed by storing data before update according to the above, and acquiring it by backing up to a backup device using backup software (for example, Patent Document 1).

JP 2005-275758 A

  In NAS devices that can be accessed from multiple client devices and used for file data sharing purposes, file data is updated, whether intentionally or unintentionally, but pre-update data is required In many cases, the protection of past data is important.

  The method of saving the file name as a different file name by adding the revision number to the user name is left up to the user itself, so if you forget to change to a different file name or make a mistake, you can always save the pre-update data. I can not say.

  On the other hand, in backups using backup software, backup and restore operations are generally performed by system administrators, and it is difficult for general users to perform operations, and the backup interval is limited to once a day. Is common.

  In addition, with the volume shadow copy function of Windows (registered trademark), pre-update data can be restored from the client device, and can be operated by a general user as needed. However, the volume shadow copy function stores up to 64 generations, and the storage interval is limited.

  Accordingly, there is a problem of a data storage method that allows past data to be used by a general user's own operation without being restricted by the number of generations to be stored or a storage interval.

  According to the present invention, a file update operation from a client device is monitored by a file update monitoring module of a NAS device, and when an existing file is updated, it is automatically saved as an alias file with the previous update date added to the file before the update. Thus, it is possible to save past data that can be operated by the user himself / herself.

  The effects obtained by the present invention will be briefly described as follows.

  In the NAS device, when the file is updated and written, the data before update is automatically saved as an alias file, so that all past data can be saved without the user's awareness. Since the data is recognizable as a file, past data can be used as needed in the user's own operation.

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

  FIG. 1 is a schematic configuration diagram showing an example in which a NAS device of the present invention and a client device are connected via a network. The NAS apparatus 101 includes a file system 103, a device driver 104, a data storage area 105 such as an HDD, a file update monitoring module 102, and a file update management table, and a plurality of clients via a network 107. This is a general configuration connected to the device 106. 1 shows a configuration in which the data storage area 105 is mounted inside the NAS apparatus 101. However, a configuration in which an external storage apparatus is connected as the data storage area is also possible. Since it is irrelevant whether the storage area is inside or outside the NAS apparatus 101, only the former configuration is described.

  Next, FIG. 2 is a flowchart showing an operation at the time of writing a file from the client apparatus 106 to the NAS apparatus 101 according to the embodiment of the present invention. The file update writing process will be described with reference to the flow of FIG.

  First, a file open request for a target file is issued from the client device 106 to the NAS device 101 (201), and the file system 103 reads the data of the target file from the data storage area 105 via the device driver 104. Here, the file update monitoring module 102 compares the file name of the read file with the information set in the file update management table, and determines whether the file is to be automatically saved with another file name (203). ). If it is not the target, the read file data is only transmitted to the client device 106 (205), and then a file write or file close request from the client device 106 is instructed to the file system 103 as it is (209). If it is determined to be the target, the file is transmitted to the client device and saved as a temporary file of an alias file in which the update date and time possessed as attribute information of the file is added to the file name of the read file data (204).

  In addition, when the client device 106 edits the file and executes overwriting, the file update monitoring module 102 instructs the file system 103 to write the file together with the temporary file stored as an alias file. Is written (207). On the other hand, when the user himself / herself writes as an alias file in the client device 106 or performs a file close operation without updating, the file update monitoring module 102 sends the file system 103 to the file system 103. Along with the write or close instruction, an instruction to delete the temporary file stored as the alias file is issued (208). Thereafter, data is written into the data storage area 105 via the device driver 104 by the file system 103.

  FIG. 3 shows the setting information of the file update management table 301. In this table, the target file name or target path information 302 to be automatically saved with another file name and the update automatically saved with another file name are shown. Interval information 303 is defined. As a result, when it is determined (203) whether the file is to be automatically saved with a different file name in the description of the above flow, along with the determination with the file name, the update date / time information of the read file is used as the system time information of the NAS device 101. If the update interval is within the update interval set in the file update management table 301, it is possible not to perform automatic saving with a different file name as a non-target file. By limiting the target file by specifying the file name, the file path name, and the update interval, it is possible to minimize the use of the data storage area by automatic saving with another file name.

It is a figure which shows the structure of the Example which applied the preservation | save method of the past data by the automatic preservation | save by another file name of this invention. It is a flowchart figure which shows the example of a method in which the file update monitoring module which concerns on the Example of this invention performs automatic preservation | save with another file name. It is the definition information which the file update management table which concerns on the Example of this invention sets. It is an Example of the file name at the time of performing automatic preservation | save with another file name based on the Example of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 101 ... NAS apparatus, 102 ... File update monitoring module, 103 ... File system, 104 ... Device driver, 105 ... Data storage area, 106 ... Client device, 107 ... Network, 108 ... File update management table.

Claims (2)

  In a NAS device that is accessed from multiple client devices via a network, it has a file update monitoring module at the upper level of the file system, and the file name before update of the file is written when the file update is written from the client device. A file storage method on the NAS device that can save all the history of updated files by changing and saving as a different file name.   In a NAS device that has a file update monitoring module, based on the information in the file update management table, the target file to be saved as a different file name by changing the file name before update of the file at the time of file update write from the client device File storage method on NAS device that can be limited to any range.

Images