fio 是一个 I/O 工具用来对硬件进行压力测试和验证，支持13种不同的I/O引擎，包括：sync, mmap, libaio, posixaio, SG v3, splice, null, network, syslet, guasi, solarisaio 等等, I/O priorities (for newer Linux kernels), rate I/O, 进程或者线程作业等等
fio 2.0.15 改进记录：
adds an --eta-newline option to insert ETA new line at fixed intervals.
Fixes for the CPU clock, notably PPC.
Fixes for workloads with read/write file locking.
A fix for skewed latencies with rated IOPS.
Fixes a bug with block sizes varying more than 64x.
Improves the LFSR implementation.
Fixes missing JSON bandwidth output.
Various fixes for the Android platform.
Uses ginstall on Solaris.
Fixes man page installation.
Other bugfixes and improvements
项目主页：http://git.kernel.dk/?p=fio.git;a=summary
来自:开源中国社区
