|To:||David Chinner <dgc@xxxxxxx>|
|Subject:||Re: Fastest Chunk Size w/XFS For MD Software RAID = 1024k|
|From:||David Greaves <david@xxxxxxxxxxxx>|
|Date:||Thu, 28 Jun 2007 08:53:54 +0100|
|Cc:||Justin Piszcz <jpiszcz@xxxxxxxxxxxxxxx>, linux-raid@xxxxxxxxxxxxxxx, xfs@xxxxxxxxxxx, Alan Piszcz <ap@xxxxxxxxxxxxx>|
|References:||<Pine.LNX.4.64.0706271918010.29111@xxxxxxxxxxxxxxxx> <Pine.LNX.4.64.0706271920350.29111@xxxxxxxxxxxxxxxx> <20070628050837.GG989688@xxxxxxx>|
|User-agent:||Mozilla-Thunderbird 22.214.171.124 (X11/20070618)|
David Chinner wrote:
On Wed, Jun 27, 2007 at 07:20:42PM -0400, Justin Piszcz wrote:For drives with 16MB of cache (in this case, raptors).That's four (4) drives, right?
I'm pretty sure he's using 10 - email a few days back...
Running test with 10 RAPTOR 150 hard drives, expect it to take awhile until I get the results, avg them etc. :)Justin Piszcz wrote:
If so, how do you get a block read rate of 578MB/s from 4 drives? That's 145MB/s per drive....
Which gives a far more reasonable 60MB/s per drive... David
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