RAID (Redundant Array of Independent Disks) reconstruction method and system and RAID

Abstract

The invention discloses an RAID (Redundant Array of Independent Disks) reconstruction method which comprises the steps that: when an RAID triggers reconstruction, an RAID main thread creates three threads, wherein three threads all include strip queues; and three threads sequentially execute thread operations in parallel according to sequences of strips in the corresponding strip queues, and when each strip queue does not include the strip, RAID reconstruction is completed, wherein a first thread mainly takes charge of carrying out a read operation, a second thread mainly takes charge of sequentially carrying out exclusive or operation processing on the strips according to the sequences of the strips in the strip queues, and a third thread mainly takes charge of sequentially issuing data in the strips into a hot standby magnetic disk according to the sequences of the strips. The RAID reconstruction work is executed in parallel in a production line mode, rather than an RAID is reconstructed by using a single reconstruction thread, so that parallelism of a CPU is sufficiently played, a speed of reconstructing the RAID is improved, and reconstruction time is greatly shortened. The invention further discloses an RAID reconstruction system and an RAID, which have the above-mentioned effects.

Description

Technical field [0001] The present invention relates to the field of computer storage technology, in particular to a method, system and RAID for RAID reconstruction. Background technique [0002] RAID (Redundant Arrays of Independent Disks, RAID), is composed of many cheaper disks, combined into a large capacity disk group, the use of individual disks to provide data to produce the bonus effect to improve the performance of the entire disk system . Using this technology, the data is cut into many sections and stored on each hard disk. At the same time, RAID also provides different levels of redundancy (except for RAID0). When a disk in the array fails, the data in the failed disk can be restored to the hot spare disk through redundant data. Thereby ensuring the integrity of user data. [0003] RAID can be divided into different levels based on redundancy and performance. Currently commonly used are RAID0, RAID1, RAID10, RAID5, RAID6, RAID7, etc. [0004] There are two main imple...

AI Technical Summary

Problems solved by technology

Using traditional RAID, if a disk is broken, it usually takes more than ten hours or even more than twenty hours to rebuild it

Images