IOzone

{{Infobox software

| name = IOzone

| logo =

| screenshot =

| caption =

| collapsible =

| author = William Norcott

| developer = Don Capps, et al{{who|date=May 2017}}

| released =

| discontinued =

| latest release version = 3.507

| latest release date = {{start date and age|2025|02|07}}

| latest preview version =

| latest preview date =

| programming language = C

| operating system =

| platform =

| size =

| language = English

| status =

| genre = Benchmark

| license =

| website = {{URL|https://www.iozone.org}}

}}

IOzone is a file system benchmark utility.{{cite book

| last = Olker

| first = Dave

| title = Optimizing NFS Performance: Tuning and Troubleshooting NFS on HP-UX Systems

| edition = 1st

| date = 2002-09-13

| publisher = Prentice Hall

| location = Upper Saddle River, New Jersey

| isbn = 0-13-042816-7

| pages = 24–26

| chapter = Local Filesystem Considerations: iozone

| quote = iozone is one of the more sophisticated filesystem performance benchmark utilities available.

}}{{cite web

| url = http://www.linux.com/archive/feature/139744

| title = IOzone for filesystem performance benchmarking

| accessdate = 2009-10-15

| last = Martin

| first = Ben

| date = 2008-07-03

| publisher = Linux.com

}} Originally made by William Norcott, further enhanced by Don Capps and others.

Source code is available from iozone.org. It does mmap() file I/O and uses POSIX Threads.

It won the 2007 Infoworld Bossie Awards for Best file I/O tool.{{cite web

| url = http://www.infoworld.com/t/storage/best-open-source-in-storage-139?page=0,1

| title = Best of open source in storage

| accessdate = 2009-10-15

| last = Venezia

| first = Paul

| date = 2007-09-10

| work = 2007 InfoWorld Bossie Awards

| publisher = InfoWorld

}}{{cite web

| url = http://www.infoworld.com/%5Bprimary-term-alias-prefix%5D/%5Bprimary-term%5D/best-open-source-in-storage-837¤t=6

| title = Best of open source in storage: slide 6 of 7

| accessdate = 2009-10-15

| date = 2007-09-10

| work = 2007 InfoWorld Bossie Awards

| publisher = InfoWorld

}}

The Windows version of IOzone uses Cygwin. Builds are available for AIX, BSDI, HP-UX, IRIX, FreeBSD, Linux, OpenBSD, NetBSD, OSFV3, OSFV4, OSFV5, SCO OpenServer, Solaris, Mac OS X, Windows (95/98/Me/NT/2K/XP).

It is available as a test profile in the Phoronix Test Suite.{{Cite web |url=http://global.phoronix-test-suite.com/?k=category&u=iozone |title=Phoronix Global - Iozone Test Results |access-date=2009-10-16 |archive-url=https://web.archive.org/web/20100219085027/http://global.phoronix-test-suite.com/?k=category&u=iozone |archive-date=2010-02-19 |url-status=dead }}