一种Linux环境下优化ZFS同步写性能的方法

An approach to optimizing synchronous write performance of ZFS on Linux

为了提高Linux环境下的ZFS文件系统的同步写性能，在研究分析现有Linux环境下实现的ZFS文件系统的块设备同步写性能较低，同步写负载较重时系统吞吐量明显下降的原因的基础上，提出了一种Linux环境下的ZFS同步写优化方法。该方法通过同步写合并提交策略减少日志提交所产生的I／O请求数；使用同步写全局负载均衡机制实现各盘之间同步写的负载均衡来提高同步写的吞吐量。实验结果表明：相比原来在Linux上实现的ZFS，该优化方法提高同步写性能23．9％-88．14％。

improve the synchronous write performance of the ZFS file system working in the Linux environment, an ap- proach to optimizing the synchronous write performance of the ZFS on Linux was proposed based on investigation of the reseans of the heavy load of the reduce the numbe ance among all di suits showed that block device＇ s lower synchronous write performance and the system＇ s low throughput under the existing ZFS on Linun. Firstly, the approach uses the strategy of coalescing synchronous write to r of disk I/Os. Secondly, it uses global load balance of synchronous writes to achieve load bal- sks in ZFS＇ s storage pool to increase the throughput of synchronous writes. The experimental re- the approach improved the synchronous write performance of the existing ZFS on Linux by 23.9%-88.14%.