Method for cluster system data fault tolerance

Abstract

The invention relates to a data fault tolerance method applicable for a cluster system; when check data is constructed and generated, a data block is transferred to a data reproduction processor from the data stored in a disk driver of a storage unit array; through an exclusive OR operation, the check data is generated and written out to a corresponding check data block, or the data in the data block and the data in the check data block are operated and written out to a corresponding data block. When the data is lost caused by the physical damage of the disk or other causes, the data in the undamaged data block of a connecting relation chain is read to a data regeneration manager and operated to generate lost data; therefore, the reproduced and lost data is written to corresponding data block of a corresponding backup disk or an original data storage data block position, thereby realizing the regeneration and reconstruction of the lost data. Through implementing the invention, the data in a damaged disk of a disk array is restored and reconstructed in time; further the lost data in a single disk or a plurality of disks are reproduced or regenerated in the disk array.

Description

technical field [0001] The invention relates to a fault tolerance method of a disk array, in particular to a disaster recovery method for disk physical damage or data damage using technologies such as disk array or network storage in a cluster system. Background technique [0002] In a high-performance cluster system, a large number of computing nodes operate on storage devices, and users frequently perform data access operations on the cluster through terminals. Frequent reading and writing increases the probability of data loss caused by physical disk damage or misoperation. , how to ensure the security of data is particularly important, and the current fault-tolerant technology more or less has some insufficient I / O read and write efficiency, time efficiency, space efficiency, etc., even when the physical damage of the disk at the same time exceeds Just reach the situation that prior art is powerless when two pieces. [0003] There are currently many solutions to solve d...

AI Technical Summary

Problems solved by technology

However, a larger disk space needs to be allocated to the error check block, and there is a greater "write loss" compared with RAID5. Due to the poor write performance and complicated implementation of RAID6, it is difficult to implement RAID6

In order to overcome the above technical deficiencies, there must be a disk fault-tolerant method for high-performance cluster systems, which can use simple XOR operations to quickly solve the problem of data loss due to physical disk damage

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