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Snapshot data backup and deletion method, device and system

A data backup and backup technology, applied in the database field, can solve the problem of incomplete snapshot data, and achieve the effect of ensuring the integrity and solving the incomplete snapshot data.

Active Publication Date: 2019-05-14
ALIBABA GRP HLDG LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Various aspects of the present application provide a snapshot data backup and deletion method, device and system to solve the problem of incomplete snapshot data that may occur during incremental backup of snapshot data in cross-domain scenarios

Method used

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

Examples

Experimental program
Comparison scheme
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Embodiment approach

[0125] In an optional implementation manner, an implementation manner of the above step 40b includes:

[0126] On the one hand, according to the state identification of each snapshot stored at the local end, identify other snapshots except the snapshot to be deleted from each snapshot stored at the local end, and obtain other snapshots from the metadata list named after the name of other snapshots The information of the data blocks to be used; on the other hand, according to the naming format of the metadata list used in the snapshot backup process, the metadata list named after the shadow snapshot name is identified, and the metadata list named after the shadow snapshot name is selected. Obtain the information of each data block that needs to be used by the snapshot to be backed up.

[0127] In an optional implementation, an implementation of the above step 40c includes: generating a normal data block information set according to the data blocks that are not required by the s...

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Abstract

The embodiment of the invention provides a snapshot data backup and deletion method, device and system. In the snapshot backup process under the cross-domain scene, a metadata list of a snapshot to bebacked up, which is named as a shadow snapshot name, is backed up to a target storage system, and then data blocks, which are not backed up to the target storage system and need to be used by the snapshot to be backed up, in the data blocks to be backed up are backed up to the target storage system in an incremental backup mode. For a targeted storage system, a metadata list named by a shadow snapshot name is received in advance, data blocks are deleted by combining the metadata list. According to the snapshot backup method and the snapshot backup device, when the snapshot to be backed up isbacked up to the target storage system, the data block needing to be used by the snapshot to be backed up cannot be deleted, so that the integrity of the snapshot to be backed up can be ensured, and the problem of incomplete snapshot data possibly occurring in the snapshot data incremental backup process in a cross-domain scene is solved.

Description

technical field [0001] The present application relates to the technical field of databases, in particular to a snapshot data backup and deletion method, device and system. Background technique [0002] In the prior art, more and more storage systems start to use the snapshot technology. In some cases, it is necessary to back up the snapshot data of one storage system (called the source storage system) to another storage system (called the destination storage system). For example, when the user of the destination storage system needs to use the snapshot data of the source storage system across domains, it is necessary to back up the snapshot data from the source storage system to the destination storage system, so that the user of the destination storage system can Use the snapshot data backed up by the source storage system. [0003] In the process of backing up snapshot data across domains, the incremental backup method can be used, that is, the data blocks that already e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F11/14
Inventor 廖武钧
Owner ALIBABA GRP HLDG LTD
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