UNIFORM PARITY GROUP DISTRIBUTION IN DISK ARRAYS WITH MULTIPLE FAILURES

被引：9

作者：

NG, SW

MATTSON, RL

机构：

[1] IBM Research, Almaden Research Center San Jose

来源：

IEEE TRANSACTIONS ON COMPUTERS | 1994年 / 43卷 / 04期

关键词：

BLOCK DESIGNS; DISK ARRAYS; DISK ARRAY FAILURE; DISK ARRAY REBUILD; I/O SYSTEMS; PERFORMANCE; RAID; SPARING; WORKLOAD DISTRIBUTION;

D O I：

10.1109/12.278490

中图分类号：

TP3 [计算技术、计算机技术];

学科分类号：

0812 ;

摘要：

Several new disk arrays have recently been proposed in which the parity groupings are uniformly distributed throughout the array so that the extra workload created by a disk failure can be evenly shared by all the surviving disks, resulting in the best possible degraded mode performance. Many arrays now also put in multiple spare disks so that expensive service calls can be deferred. Furthermore, in a new sparing scheme called distributed sparing, the spare spaces are actually distributed throughout the array. This means after a rebuild the new array will be logically different from the original array. This brief contribution presents an algorithm for constructing and maintaining arrays with distributed sparing so that repeated uniform parity group distribution is achieved with each successive failure.

引用

页码：501 / 506

页数：6