Date: Thu, 23 Aug 2001 12:05:17 +0100 From: "Lawrence Farr" <freebsd-hw@sixforty.co.uk> To: "'Hodge Podge'" <nicole@unixgirl.com>, "'Darryl Okahata'" <darrylo@soco.agilent.com> Cc: "'Michael VanLoon'" <MichaelV@edifecs.com>, <freebsd-hardware@freebsd.org>, "'Marc Rassbach'" <marc@milestonerdl.com> Subject: RE: 3ware stuff not ready for heavy duty useage-followup Message-ID: <004101c12bc3$81e74900$c80aa8c0@lfarr> In-Reply-To: <XFMail.010822110000.nicole@unixgirl.com>
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I left my server (previous email below) running a benchmark that I made
up that took
a 1mb file and cat'ed to another file until it got to 1Gb.
I then read the file back by cat'ing to /dev/null, and repeated until I
filled the
partition (140Gb). It did this 3 times in total and got results like:
Pass 23 - 1048576 kb written in 115 seconds, at 9118 kb/Sec
Pass 23 - 1048576 kb read in 15 seconds, at 69905 kb/Sec
Pass 24 - 1048576 kb written in 116 seconds, at 9039 kb/Sec
Pass 24 - 1048576 kb read in 15 seconds, at 69905 kb/Sec
It all works fine, but the writes are awful. Iozone seems to agree with
me:
File size set to 10240 KB
Time Resolution = 0.000001 seconds.
Processor cache size set to 1024 Kbytes.
Processor cache line size set to 32 bytes.
File stride size set to 17 * record size.
random random
KB reclen write rewrite read reread read write read
10240 4 9397 9461 266043 266458 236609 188083 253962
Anyone got any ideas for tuning this? Or is that it performance wise?
How about splitting the drives to 4 stripe sets, and Raid 5 across them
with vinum?
Anyone else want to see any specific tests?
>-----Original Message-----
>From: Lawrence Farr [mailto:freebsd-hw@sixforty.co.uk]
>Sent: 22 August 2001 14:59
>To: 'Hodge Podge'
>Cc: 'mike.wentz@3ware.com'; 'freebsd-hardware@FreeBSD.ORG';
>'Borja Marcos'; 'Michael VanLoon'; 'val@picturetrail.com'
>Subject: RE: 3ware stuff not ready for heavy duty useage- ATTN 3ware
>
>
>Im just formatting an 8 drive (Maxtor 536DX 100Gb) 7000 series
>array, 400W supply.
>
>Pick a benchmark and I'll run it for a while.
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