From: Stan Hoeppner <stan@hardwarefreak.com>
To: Stefan Ring <stefanrin@gmail.com>
Cc: Roger Willcocks <roger@filmlight.ltd.uk>, Linux fs XFS <xfs@oss.sgi.com>
Subject: Re: A little RAID experiment
Date: Fri, 27 Apr 2012 09:03:47 -0500 [thread overview]
Message-ID: <4F9AA743.7020709@hardwarefreak.com> (raw)
In-Reply-To: <CAAxjCEyni5=OG=AU+UMO-jfnP3q6MUanki2Nk7p=_mxdqveqwA@mail.gmail.com>
On 4/25/2012 11:23 AM, Stefan Ring wrote:
>> Result (seems reasonably consistent):
>>
>> Operations performed: 0 Read, 127458 Write, 0 Other = 127458 Total
>> Read 0b Written 995.77Mb Total transferred 995.77Mb (66.337Mb/sec)
>> 8491.11 Requests/sec executed]
>
> Holy moly, this is an entirely different game you're playing here! I
> suppose that you're using a battery backed write cache?
He's running a 20 data spindle RAID60, across two decent hardware RAID
cards each with 512MB write cache, so of course it's going to be much
faster than your 4 data spindle RAID6, even with slightly slower spindles.
Note that 8x 15K drives in RAID10 on your P410i should slightly surpass
Roger's RAID60 performance, ~70MB/s vs 66MB/s. 3x fewer drives for
roughly equal performance, but obviously less capacity.
--
Stan
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next prev parent reply other threads:[~2012-04-27 14:03 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-04-25 8:07 A little RAID experiment Stefan Ring
2012-04-25 14:17 ` Roger Willcocks
2012-04-25 16:23 ` Stefan Ring
2012-04-27 14:03 ` Stan Hoeppner [this message]
2012-04-26 8:53 ` Stefan Ring
2012-04-27 15:10 ` Stan Hoeppner
2012-04-27 15:28 ` Joe Landman
2012-04-28 4:42 ` Stan Hoeppner
2012-04-27 13:50 ` Stan Hoeppner
2012-05-01 10:46 ` Stefan Ring
2012-05-30 11:07 ` Stefan Ring
2012-05-31 1:30 ` Stan Hoeppner
2012-05-31 6:44 ` Stefan Ring
2012-07-16 19:57 ` Stefan Ring
2012-07-16 20:03 ` Stefan Ring
2012-07-16 20:05 ` Stefan Ring
2012-07-16 21:27 ` Stan Hoeppner
2012-07-16 21:58 ` Stefan Ring
2012-07-17 1:39 ` Stan Hoeppner
2012-07-17 5:26 ` Dave Chinner
2012-07-18 2:18 ` Stan Hoeppner
2012-07-18 6:44 ` Stefan Ring
2012-07-18 7:09 ` Stan Hoeppner
2012-07-18 7:22 ` Stefan Ring
2012-07-18 10:24 ` Stan Hoeppner
2012-07-18 12:32 ` Stefan Ring
2012-07-18 12:37 ` Stefan Ring
2012-07-19 3:08 ` Stan Hoeppner
2012-07-25 9:29 ` Stefan Ring
2012-07-25 10:00 ` Stan Hoeppner
2012-07-25 10:08 ` Stefan Ring
2012-07-25 11:00 ` Stan Hoeppner
2012-07-26 8:32 ` Dave Chinner
2012-09-11 16:37 ` Stefan Ring
2012-07-16 22:16 ` Stefan Ring
2012-10-10 14:57 ` Stefan Ring
2012-10-10 21:27 ` Dave Chinner
2012-10-10 22:01 ` Stefan Ring
2012-04-26 22:33 Richard Scobie
2012-04-27 21:30 ` Emmanuel Florac
2012-04-28 4:15 ` Richard Scobie
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