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IOzone 3.430

A filesystem benchmark program

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IOzone screenshotIOzone is an easy to use filesystem benchmark program. The benchmark creates and measures a suite of file operations. Iozone has been ported to many computers and operates under many operating systems. Iozone is good for performing an extensive filesystem analysis of a vendor’s PC platform. The benchmark tests file I/O performance for the next operations: Read, re-read, write, read backwards, re-write, read strided, fwrite, fread, random read, ,mmap, pread, aio_read, aio_write.

Benchmark Features:

- ANSII C source
- Mmap() file I/O
- POSIX async I/O
- Normal file I/O
- Multiple stream calculation
- Single stream calculation
- Distributed fileserver calculations (Cluster)
- POSIX pthreads
- Multi-process calculation
- Excel importable output for graph generation
- Latency plots
- 64bit compatible source
- Large file compatible
- Stonewalling in throughout tests to remove straggler effects
- Processor cache size customizable
- Selectable measurements with fsync, O_SYNC


  • Performs a broad filesystem analysis.
  • Performs 13 types of tests.
Name IOzone
Version 3.430
Developer | see all products from this developer
Product Homepage IOzone
License Free (Freeware)
Last Week Downloads 8
All Time Downloads 3,428
Filename IozoneSetup.exe
Filesize 7.7MB
MD5 Checksum 245CDD09218F773089C075014A7C840C
OS Support Windows All
Category Utilities


Old Versions

Software Date Added
IOzone 3.430 January 15, 2015 - Latest Version
IOzone 3.429 August 12, 2014
IOzone 3.428 July 28, 2014
IOzone 3.424 April 10, 2014
IOzone 3.420 July 11, 2013

Download the free IOzone