Method for optimizing writing performance of redundant array of independent disk (RAID5)-grade disk array

Abstract

The invention discloses a method for optimizing the writing performance of a redundant array of independent disk (RAID5)-grade disk array and has a continuous data protection function, and belongs to the field of computer data storage. By the method, the problem that the systematic response is slow when a writing load request of the RAID5-grade disk array is assembled is solved. The method comprises steps of constructing a storage system, reading and writing data and restoring data after a disk fails; by adoption of a storage system organization scheme of array and data backup disk stripping,the response speed of the system is increased by updating a pause check bit and reducing the I / O frequency of the disk due to writing operation; meanwhile, the array can be restored to a state at anyprevious time point by using the data of the backup disk. By the method for updating the pause check bit, the performance of the system is enhanced when the writing load request of the RAID5-grade disk array having the continuous data protection function is assembled; furthermore, the method for optimizing the writing performance can be used in a storage environment in which the data protection function is required and the load sudden rate is high, and is applicable to constructing high performance and high reliability storage systems.

Description

technical field [0001] The invention belongs to the field of computer data storage, and in particular relates to a writing performance optimization method of a RAID5 level disk array with a continuous data protection function. Background technique [0002] With the development of computer technology and network communication technology, the degree of informatization is getting higher and higher, and people's requirements for data reliability and key data protection are also getting higher and higher. Disk array RAID (Redundant Array of Independent Disks) is a typical device in the field of reliable storage systems. The working principle and characteristics of disk arrays: the basic structural feature of RAID is striping, which binds two or more physical disks into groups , forming a separate logical disk. Continuous Data Protection (CDP) is a major breakthrough in the field of traditional data protection. The system records the relevant information of each data update reque...

AI Technical Summary

Problems solved by technology

[0005] The present invention proposes a method for optimizing the write performance of a RAID5 disk array, which also has the function of continuous data protection. It adopts a structure combining an array and a backup disk, and by suspending the update of the parity bit, the write performance of RAID5 is improved, especially The effect is more obvious when the load is heavy, and it solves the problem of poor write performance of the existing RAID5 level disk array when the load is heavy

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