基于RAID6编码的校验盘故障修复算法

FAILURE RECOVERY ALGORITHM FOR PARITY DISK BASED ON RAID6 CODE

针对基于RAID6编码的分布式存储系统中校验盘故障修复问题,提出一种快速修复算法。通过对RDP和EVENODD编码的理论分析,利用节点的计算编码能力,传输经过编码的数据块来修复校验盘,减少修复过程中的数据传输量,缩短修复时间。理论分析表明,相比于传统修复算法,该算法可显著减少校验盘故障修复过程中耗费的带宽资源,提高修复效率。

We propose a fast recovery algorithm for parity disk failure recovery in RAID6-coded distributed storage system. Through theoretical analysis on RDP and EVENODD codes, we use encoding computation ability of the node and transmit the encoded data blocks to recover the parity disk, reduce the amount of data transmitted during the recovery process, and speed up the recovery time. Theoretical analyses show that this algorithm outperforms the conventional parity disk recovery algorithm significantly in terms of bandwidth consuming in failure recovery process, the efficiency of recovery is improved as well.