性能优化的双盘非同时故障容错布局分析

在分析双盘非同时故障容错模型的基础上,本文建议两种性能优化的布局：预留和约束的校验散布容错布局。当出现单盘故障后,这两种布局在不需要立即替换故障磁盘的情况 下自动过渡到另一个单磁盘故障容错的数据布局。约束的校验散布单盘故障布局便于提高校验写和单盘故障恢复性能,而且过渡算法实现较快。

The Analysis of Performance-Optimization Layout Against Non-Simultaneous Double Disk Failures

Based on analyzing the model of non-simultaneous double disk failure tolerance,two performance-optimization layouts of reservation and constraint parity 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 failovers,and the transient algorithm can be implemented more quickly.