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Snapshot deletion method, device and system

A deletion method and a snapshot technology, applied in the storage field, can solve time-consuming problems, reduce the number of comparison operations and improve efficiency

Active Publication Date: 2022-08-02
ALIBABA GRP HLDG LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the deletion process, all snapshot data are generally compared to identify useless snapshot data, which is time-consuming

Method used

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  • Snapshot deletion method, device and system
  • Snapshot deletion method, device and system
  • Snapshot deletion method, device and system

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Experimental program
Comparison scheme
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Embodiment approach

[0095] In an exemplary embodiment, in the above step 30b, it is necessary to traverse the normal data blocks corresponding to the same storage partition in the normal snapshot each time to obtain non-duplicated normal data blocks corresponding to at least one storage partition included in the data storage space. . Taking the first storage partition in the at least one storage partition as an example, normal data blocks corresponding to the first storage partition in the normal snapshot are traversed to obtain non-duplicated normal data blocks corresponding to the first storage partition. An implementation manner of traversing the normal data blocks corresponding to the first storage partition in the normal snapshot to obtain non-duplicated normal data blocks corresponding to the first storage partition includes:

[0096]A subset of data blocks is created for the first storage partition, and the subset of data blocks is used to store non-repetitive normal data blocks correspond...

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Abstract

Embodiments of the present application provide a snapshot deletion method, device, and system. In this embodiment of the present application, when it is necessary to delete a snapshot of a cloud disk, non-duplicate normal data blocks in the normal snapshot of the data storage space are identified, and according to the non-duplicated normal data blocks in the normal snapshot Delete the useless data blocks that can be deleted in the snapshot; in the process of identifying the non-duplicated normal data blocks in the normal snapshot, traverse the normal data blocks corresponding to the same storage partition in the normal snapshot each time to obtain the data contained in the data storage space. In this way, only the data blocks corresponding to the same storage partition need to be compared, and there is no need to compare the data blocks corresponding to different storage partitions, which reduces the number of data blocks. The number of block comparison operations improves the efficiency of the entire snapshot deletion operation.

Description

technical field [0001] The present application relates to the field of storage technologies, and in particular, to a method, device and system for deleting snapshots. Background technique [0002] With the increase of storage requirements, snapshot technology is adopted by more and more storage systems. A snapshot is actually a fully usable copy of the data in the storage system, which includes an image of the data in the storage system at the time the copy started. [0003] After the snapshot is created, the snapshot needs to be stored. In this way, when an application failure or file corruption occurs in the storage system, the data in the storage system can be restored to the state at the point in time when the snapshot was generated in time. [0004] As the storage system is used, the number of snapshots will continue to increase. To save storage space, you can delete some useless snapshot data to free up storage space. In the deletion process, all snapshot data are g...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/06
Inventor 廖武钧
Owner ALIBABA GRP HLDG LTD