Method for achieving parallel reconstruction of data on RAID

Abstract

The invention discloses a method for achieving the parallel reconstruction of data on an RAID (redundant array of independent disk), particularly achieving the parallel reconstruction thereof in a sub-array distribution manner, wherein the sub-array comprises the blocks of different disks. The method comprises the following steps: respectively and simultaneously searching the other blocks constituting the same sub-array together with each block in a data disk; and reconstructing the data in the block according to the data in the other blocks. The method of the invention can shorten the process of data reconstruction by times, more particularly, all the operations of reconstruction, either reading or writing the related data, are parallel operations, and the requests from onstage users can be responded on a real-time basis in the reconstruction process, thus effectively reducing the average time for responding to the users, improving the reliability of the system and enhancing the performance thereof at the same time.

Description

technical field The invention belongs to the technical field of array data reconstruction, in particular to a method supporting parallel data reconstruction. Background technique A disk failure will cause the storage system to work in a degraded mode, which will lead to overall performance degradation. Therefore, in order to ensure the performance and reliability of the system, the data on the failed disk must be reconstructed. How to ensure the performance of the system during data reconstruction while speeding up the reconstruction speed are two aspects that need to be considered in data reconstruction, which involves many data reconstruction technologies. Currently, data reconstruction is aimed at reconstruction time and user balance. The two indicators of response time are mainly optimized and improved from the two aspects of data or check block distribution and data flow analysis, so as to improve system performance. The first way of data reconstruction mainly uses th...

AI Technical Summary

Problems solved by technology

Although the above methods have more or less improved or improved the reconstruction time and average response time, the reconstruction time is still very long, which also poses a threat to the reliability of the system

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