Date: Fri, 21 Sep 2007 20:33:47 +0400 From: "=?KOI8-R?B?7cnIwcnMIO3PzsHbo9c=?=" <softsearch@gmail.com> To: "Pawel Jakub Dawidek" <freebsd-geom@freebsd.org> Subject: Re: raidtest for zfs Message-ID: <dcf881c30709210933s6d92cb2dh830be87fb067037c@mail.gmail.com> In-Reply-To: <20070921143318.GC5690@garage.freebsd.pl> References: <dcf881c30709210406j59603347vba8494eb5105932c@mail.gmail.com> <20070921143318.GC5690@garage.freebsd.pl>
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> > How to run raidtest ( > > http://www.freebsdsoftware.org/benchmarks/raidtest.html ) on zfs? > > > > diskinfo dos'n work. > > raidtest is for block device testing. If you want to test ZFS with it, > you need to create ZVOL with 'zfs create -V' command, eg. > > # zpool create tank raidz da{0,1,2,3,4} > # zfs create -V 100g tank/vol > # diskinfo -v /dev/zvol/tank/vol I get strange and fantastic results: > raidtest genfile -s 209715200 -S 512 -n 50000 -r -f File raidtest.data generated. Number of READ requests: 50000. Number of WRITE requests: 0. Number of bytes to transmit: 3279956992. > raidtest test -d /dev/zvol/tank/vol -n 10 Read 50000 requests from raidtest.data. Number of READ requests: 50000. Number of WRITE requests: 0. Number of bytes to transmit: 3279956992. Number of processes: 10. Bytes per second: 245146813 Requests per second: 3737 ^^^^^ - too big! > raidtest genfile -s 209715200 -S 512 -n 50000 -f File raidtest.data generated. Number of READ requests: 25046. Number of WRITE requests: 24954. Number of bytes to transmit: 3311506944. > raidtest test -d /dev/zvol/tank/vol -n 10 Read 50000 requests from raidtest.data. Number of READ requests: 25046. Number of WRITE requests: 24954. Number of bytes to transmit: 3311506944. Number of processes: 10. Bytes per second: 195043585 Requests per second: 2944 ^^^^^ - too big! The real results is: > raidtest test -d /dev/raid3/g3 -n 10 Read 50000 requests from raidtest.data. Number of READ requests: 50000. Number of WRITE requests: 0. Number of bytes to transmit: 3316146176. Number of processes: 10. Bytes per second: 11398078 Requests per second: 171 What is wrong? How to run raidtest correctly on /dev/zvol/tank/vol ? -- Michael
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