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Multi threaded random IO

To: xfs mailing list <xfs@xxxxxxxxxxx>, linux-fsdevel@xxxxxxxxxxxxxxx
Subject: Multi threaded random IO
From: Milind Dumbare <milind@xxxxxxxxx>
Date: Fri, 17 Jul 2009 02:28:14 -0700
User-agent: Thunderbird 2.0.0.22 (Windows/20090605)
Any standard comparison between multi threaded random Write vs multi threaded random Read on XFS or any other filesystem?

I see multi threaded random Write faster than multi threaded random Read. Which is contradictory to standard "Reads faster that Writes" law.

My test setup is.
10MB record size, 2TB filesize, 8 threads.iozone

Any comments?

Thanks,
Milind

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