Date: Mon, 24 Nov 2003 08:31:25 +0100 From: Andreas Braukmann <braukmann@tse-online.de> To: Martin Blapp <mb@imp.ch> Cc: Allen Briggs <briggs@wasabisystems.com> Subject: Re: Very bad FreeBSD SCSI RAID5 write speed performance Message-ID: <2147483647.1069662685@[192.168.225.206]> In-Reply-To: <2147483647.1068736510@[192.168.111.140]> References: <20031112172306.J4572@pooker.samsco.home> <20031113084355.P13503@cvs.imp.ch> <20031113132327.GF13029@canolog.ninthwonder.com> <20031113142735.S13503@cvs.imp.ch> <2147483647.1068736510@[192.168.111.140]>
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--On Donnerstag, 13. November 2003 15:15 Uhr +0100 Andreas Braukmann <braukmann@tse-online.de> wrote: well, ... I had a really bad time updating the opteron -current box, but it's up and running again since yesterday. > --On Donnerstag, 13. November 2003 14:29 Uhr +0100 Martin Blapp <mb@imp.ch> wrote: >>> On Thu, Nov 13, 2003 at 06:38:53AM -0500, Gary Stanley wrote: >>> > root@64:[/tmp/blah]>dd if=/dev/zero of=/tmp/blah/blah >>> > 89472+0 records in >>> > 89471+0 records out >>> > 45809152 bytes transferred in 8.546312 secs (5360108 bytes/sec) > Another system: Tyan K8S, Adaptec 2200S, RAID-5 over five spindles > (Fujitsu U320, 10kUPM disks, write-cache off) across both channels, > -current from end of september (i386): > > opti# dd if=/dev/zero of=./test bs=128k count=20000 > 20000+0 records in > 20000+0 records out > 2621440000 bytes transferred in 57.648042 secs (45473184 bytes/sec) > > I'll update the Opteron box to a recent kernel and will check again. bad news: I've lost my five spindle raid-5 volume, because I have to put two drives to another box. The result using a 3 spindle raid-5 (-current kernel; 3 days old) opti% dd if=/dev/zero of=test.dd bs=128k count=20000 20000+0 records in 20000+0 records out 2621440000 bytes transferred in 62.211180 secs (42137764 bytes/sec) The performance seems pretty normal to me. -Andreas
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