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 large development team
with stable Y-O-Y commits -
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took an estimated 25 years of effort (COCOMO model)
starting with its first commit in December, 2005
ending with its most recent commit 3 days 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 SummaryMay 25 2025 — Jun 24 2025
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12 Month SummaryJun 24 2024 — Jun 24 2025
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