A data update method and related device

Abstract

Embodiments of the present invention provide a data updating method and a related device, which relate to the field of data processing. The method includes: when there are data blocks to be updated in the data stripe, determining the data block to be read according to the data block to be updated and the data stripe; wherein, the number of data blocks to be read is less than or equal to the number of reserved data blocks ;The reserved data block is the data block except the data block to be updated in the data stripe, and the data stripe is based on the storage data configured by the erasure code; read the data block to be read, and according to the data block to be read The strip is updated. Since the determined number of data blocks to be read is less than or equal to the number of reserved data blocks, each time the data stripe is updated, the number of reads of the data blocks to be read is less than or equal to the number of reserved data blocks The number ensures that when the data stripe is updated, additional data reading can be reduced to achieve the purpose of improving data reading and writing performance.

Description

technical field [0001] The present invention relates to the field of data processing, in particular to a data updating method and a related device. Background technique [0002] Erasure Coding (EC) is a technology that can improve data storage capabilities, and can significantly improve the capacity utilization of storage systems. It can divide the data to be stored into N data blocks and M check blocks for storage, and can reconstruct the lost blocks according to the remaining blocks in the case of missing some blocks. Among them, a group Complete N data blocks and M check blocks are called a data stripe. [0003] However, when the data stripe is to be updated, it is necessary to perform multiple read operations on the data stripe to realize the update of the data stripe, which will cause additional data reads, and the additional data read times are often The total number of chunks close to the data stripe. [0004] Therefore, the current method for updating data stripes...

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Problems solved by technology

[0003] However, when the data stripe is to be updated, it is necessary to perform multiple read operations on the data stripe to realize the update of the data stripe, which will cause additional data reads, and the additional data read times are often The total number of chunks close to the data stripe

[0004] Therefore, the current method for updating data stripes has the problems of high number of additional data reads and low data read and write performance.

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