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Snapshot management method and device

A management method and snapshot technology, which is applied in the computer field, can solve the problems of difficult rollback of directory snapshots, low efficiency, and high complexity of directory snapshot deletion.

Active Publication Date: 2014-02-12
邳州辉腾经发建设有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Embodiments of the present invention provide a method and device for directory snapshots, which can perform unified management of directory snapshots and file system snapshots, and solve the problems of difficult rollback of directory snapshots and high complexity and low efficiency of directory snapshot deletion

Method used

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  • Snapshot management method and device

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Embodiment Construction

[0085] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0086] Embodiments of the present invention provide a snapshot management method, such as figure 1 As shown, the method includes:

[0087] S101. Obtain a snapshot management command, where the snapshot management command includes a create command, a delete command, and a rollback command.

[0088] S102. Execute a snapshot management operation corresponding to the snapshot management command on the snapshot management linked list according to the snapshot mana...

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Abstract

The embodiment of the invention provides a snapshot management method and device, and relates to the field of computers. The snapshot management method and the device can be applied to the unified management of a directory snapshot and a file system snapshot, and can be used for solving the problems that the rollback of the directory snapshot is difficult to implement, and the detection of the directory snapshot is high in complexity and low in efficiency. The snapshot management method comprises the following steps: acquiring a snapshot management instruction, and carrying out the corresponding snapshot management operation on the snapshots in the types of the file system snapshot and the directory snapshot in a snapshot management linked list and the block modification log linked list according to the snapshot management instruction and by using the directory snapshot mapping list in combination. The embodiment of the invention is applied to the management of the file system snapshot and the directory snapshot.

Description

technical field [0001] The invention relates to the computer field, in particular to a snapshot management method and device. Background technique [0002] A snapshot (SnapShot) is a mirror image of a data set at a specific moment, also known as an instant copy, which is a complete and available copy of the data set. For the file system, the file system snapshot is an instant copy of the file system, which contains all the information of the file system at the time of snapshot generation, and is itself a complete and usable copy. [0003] In order to facilitate the implementation of file system snapshots, there are many mature methods, one of which is to use the ROW (Redirect on Write, redirection on write) technology. In this method, when the data is rewritten, a new location will be selected for the updated data; at the same time, the pointer to the data will also be remapped to point to the updated data. [0004] A directory snapshot is a special type of snapshot. It is...

Claims

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Application Information

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IPC IPC(8): G06F12/00G06F12/16
Inventor 张森
Owner 邳州辉腾经发建设有限公司
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