Project Summary
fio is an I/O tool meant to be used both for benchmark and stress/hardware verification. It has support for 12 different types of I/O engines (sync, mmap, libaio, posixaio, SG v3, splice, null, network, syslet, guasi, and more), I/O priorities (for newer Linux kernels), rate I/O, forked or threaded jobs, and much more. It can work on block devices as well as files. fio accepts job descriptions in a simple-to-understand text format. Several example job files are included. fio displays all sorts of I/O performance information. It supports Linux, FreeBSD, and OpenSolaris.
fio is extremely flexible and can be control IO in almost any fashion.
In a Nutshell, fio...
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has a well established, mature codebase
maintained by a very large development team
with stable Y-O-Y commits -
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took an estimated 26 years of effort (COCOMO model)
starting with its first commit in December, 2005
ending with its most recent commit about 22 hours ago
Quick Reference
GNU General Public License v2.0 or later
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Commercial Use
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These details are provided for information only. No information here is legal advice and should not be used as such.
Project Security
Vulnerabilities per Version ( last 10 releases )
There are no reported vulnerabilities
Project Vulnerability Report
Security Confidence Index
Vulnerability Exposure Index
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30 Day SummaryAug 20 2025 — Sep 19 2025
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12 Month SummarySep 19 2024 — Sep 19 2025
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