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Snapshoot management method and device

A management method and snapshot technology, applied in the direction of program control device, input/output to record carrier, software simulation/interpretation/simulation, etc.

Active Publication Date: 2015-06-17
XFUSION DIGITAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, there is currently no method for processing snapshots of arbitrary directories in a distributed file system with no file layout and global Inode Table

Method used

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  • Snapshoot management method and device
  • Snapshoot management method and device

Examples

Experimental program
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Embodiment Construction

[0048] see figure 1 with figure 2 , figure 1 with figure 2 is a structural schematic diagram of the file system applied by the snapshot management method of the present invention, and the file system applied by the snapshot management method of the present invention is a distributed file system, such as figure 1 As shown, the distributed file system of the present invention includes a client (CA, Client Agent), multiple metadata servers (MDS, MetaData Server) and data servers (DS, Data Server), wherein the MDS is responsible for managing the metadata of the file system Data information, DS is responsible for managing data.

[0049] A directory may include multiple subdirectories or subfiles, and each directory and its subdirectories or subfiles may be managed by different MDSs, such as figure 2 As shown, different MDSs manage different directories or files respectively. In the following embodiments, MDS and DS are collectively referred to as servers.

[0050] see im...

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PUM

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Abstract

The invention discloses a snapshoot management method and device. The snapshoot management method includes the steps that a server receives a snapshoot identification request from a client side, wherein a snapshoot identification is used for identifying a snapshoot generated by a client side file system; a latest snapshoot number of the whole file system is generated and fed back to the client side as the snapshoot identification, and a file descriptor structure of the file system is updated; a track file corresponding to the snapshoot generated by the file system is built and used for tracking files and recording the change information of the file system after the snapshoot is generated. In this way, the snapshoot management method and device can realize any catalogue snapshoot for the distribution type file system without a file layout or an overall file descriptor structure table.

Description

technical field [0001] The invention relates to the technical field of data protection, in particular to a snapshot management method and device. Background technique [0002] In NAS (Network Attached Storage, Network Attached Storage) applications, snapshots are becoming more and more important as a means of local backup. The administrator can perform snapshot protection on the data of the file system by manually taking snapshots or scheduled tasks. Once the current system fails, it can quickly roll back to the previous point in time to reduce the probability of data loss. There are also many applications for remote replication It needs to be done based on snapshots, so for a NAS system, snapshot technology is essential. [0003] Currently, there are two main snapshot implementation methods. One is a system-level snapshot that supports ROW (Redirect On Write, redirection on write), but this system-level snapshot is not flexible enough, and current NAS products generally us...

Claims

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Application Information

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IPC IPC(8): G06F3/06G06F9/455
Inventor 叶茂
Owner XFUSION DIGITAL TECH CO LTD
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