A method and a product for snapshot management and difference bitmap generation in a distributed storage system

A distributed storage and snapshot technology, which is applied in the fields of response error generation, electrical digital data processing, error detection of redundant data in operation, etc. The number of connections is reduced, the acquisition efficiency is improved, and the number of times is reduced.

Active Publication Date: 2019-01-08
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, snapshot incremental data collection takes a long time in the distributed storage system scenario

Method used

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  • A method and a product for snapshot management and difference bitmap generation in a distributed storage system
  • A method and a product for snapshot management and difference bitmap generation in a distributed storage system
  • A method and a product for snapshot management and difference bitmap generation in a distributed storage system

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Embodiment Construction

[0042] Embodiments of the present invention will be described below with reference to the drawings in the embodiments of the present invention.

[0043] Figure 1A It is a schematic diagram of the architecture of a distributed storage system. It includes a client 101, a storage node cluster 102, and a backup storage system 103. The user controls the storage node cluster 102 through the client 101, such as triggering the storage node cluster 102 to create a snapshot for the LUN, creating a difference bitmap, performing read and write operations, etc., and the backup storage system 103 is used to back up the data of the LUN in the storage node cluster 102 , when the backup storage system 103 synchronizes with the distributed storage system for the first time, the client 101 triggers the storage node cluster 102 to create a snapshot for the LUN. Copy, so all the data in the snapshot created this time is copied to the backup storage system 103, and the snapshot can be used later....

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Abstract

A method and a product for snapshot management and difference bitmap generation in a distributed storage system are disclosed. The distribute storage system comprises N storage nodes, and the N storage nodes are use for providing storage space for a first logical unit number LUN. The method for snapshot management includes: the storage node Ni generates a first record; the first record is only used to record the update address corresponding to the logical address of the first LUN distributed at the storage node Ni at the time of the first snapshot; the logical addresses of the first LUN distributed at the storage node Ni and the logical addresses of the second LUN distributed at the storage node Ni belong to the same partition; the storage node Ni generates a second record for recording only the update address corresponding to the logical address of the first LUN distributed at the storage node Ni at the second snapshot time; the first snapshot time and the second snapshot time are adjacent snapshot times. The invention is favorable for improving the obtaining efficiency of the difference bitmap.

Description

technical field [0001] The invention relates to the technical field of distributed storage, in particular to a method and product for generating management snapshots and differential bitmaps in a distributed storage system. Background technique [0002] Distributed storage systems usually use Figure 1A The architecture shown includes a cluster of storage nodes. Users control the storage node cluster through the client, such as triggering the storage node cluster to create a snapshot for a logical unit number (LUN), create a difference bitmap, and perform read and write operations. The backup storage system is used to back up the data of the LUN in the storage node cluster. When the backup storage system and the distributed storage system are synchronized for the first time, the client triggers the storage node cluster to create a snapshot for the LUN, or the distributed storage system creates a snapshot for the LUN at a predetermined interval , such as creating the first s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F11/14
CPCG06F11/1448
Inventor 张航张良翔尹青云
Owner HUAWEI TECH CO LTD
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