关键词: 磁盘阵列 双盘非同时故障 性能优化

Abstract:

Based on analyzing the model of non-simultaneous double disk failure tolerance, two performance-optimization layouts of reservation and constraint par ity de-clustering are proposed. When a single disk fails, one layout does not need to replace the failed disk at once and automatically turn to another  against a single disk failure. Constraint parity de-clustering layouts are convenient to improve the performance of parity writes and single disk failov  ers, and the transient algorithm can be implemented more quickly.

Key words: （disk arrays tnon-simultaneous double disk failures, performance optimization）