Generate I/O for benchmarking, stress testing, verification or workload reproduction purposes. Created by Jens Axboe fio is an I/O tool meant for both for benchmark and stress/hardware verification. It has support for many different types of I/O engines, I/O priorities (on newer Linux kernels), rate limited I/O, forked or threaded jobs and much more.fio can work on either of block devices or files and accepts job descriptions in a simple-to-understand text format. All sorts of I/O performance information (including IO latencies and percentiles) can be displayed.
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fio
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