Data storage method and device

Abstract

The embodiment of the invention?discloses a data storage method and device, belonging to the technical field of electronic?information,?which can store data?in multiple?resource pools to reduce the probability of completely damaging the data and improve the security of data. The data storage method is used for the storage system, the resource pools in the storage system are logically divided into?at least 2 sub?resource pools, each sub resource pool comprises adjacent N storage apparatus, N being larger than and equal to 2. The data storage method comprises the following steps: dividing the data to be stored into R slices, distributing the slices into the divided sub resource pools, wherein the number of the desirably generated copies of the data to be stored is small than N, R being larger than and equal to 2; generating a copy slice of each slice distributed in each sub resource pool and storing the copy slice in the sub resource pool corresponding to the slice, wherein the copy slice is corresponded to the same slice of the data to be stored.

Description

technical field [0001] The invention relates to the technical field of electronic information, in particular to a method and device for storing data. Background technique [0002] Distributed storage technology is a commonly used data storage technology. In the distributed storage scenario, all hard disks in the system can be managed as a storage resource pool in a unified manner. When the system reads, writes and stores data, it uses the The entire storage resource pool is used as a storage area for data interaction. E.g: [0003] The distributed storage system can map a virtual volume to all hard disks in the storage resource pool, and divide the space on the volume into several 1M data blocks, and each data block corresponds to one of all the hard disks in the resource pool. The block stores the logical partition unit Partition. When a Partition has multiple copies, all data in a Partition will be saved in multiple copies. For example, in a double-copy scenario, each d...

AI Technical Summary

Problems solved by technology

[0005] In the existing distributed storage system, if any hard disk is damaged, data reconstruction will be performed. During the data reconstruction process, if other hard disks in the storage resource pool fail again, the data of the entire virtual volume will be damaged. For example: figure 1 As shown, when the hard disk 1 is damaged and data recovery starts, if the hard disk 2 is damaged, the corresponding copy P1' for repairing the hard disk 1 stored on the hard disk 2 will be damaged, so that the data cannot be repaired, resulting in the entire virtual Volume data corruption reduces data security

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