From: Chuck Ebbert <76306.1226@compuserve.com>
To: "Jonathan Vardy" <jonathan@explainerdc.com>
Cc: linux-kernel <linux-kernel@vger.kernel.org>
Subject: RAID 5 performance problems
Date: Thu, 3 Apr 2003 15:10:45 -0500 [thread overview]
Message-ID: <200304031512_MC3-1-32E0-8338@compuserve.com> (raw)
>Tos be certain that this was not the bottleneck, I removed it
>from the raid so that is runs in degraded mode. This did not
>change the performance much
Don't do that and expect a valid performance test.
On average, one-fifth of all array reads will cause reads from all four
remaining disks in order to reconstruct the missing data when you run
in that mode.
--
Chuck
next reply other threads:[~2003-04-03 20:02 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-04-03 20:10 Chuck Ebbert [this message]
-- strict thread matches above, loose matches on Subject: below --
2003-04-04 16:01 Jonathan Vardy
2003-04-05 0:10 ` Jonathan Vardy
2003-04-04 15:05 Jonathan Vardy
2003-04-04 11:44 Jonathan Vardy
2003-04-04 14:39 ` Ezra Nugroho
2003-04-03 19:49 Andy Arvai
2003-04-03 20:25 ` Mike Dresser
2003-04-03 21:10 ` Jonathan Vardy
2003-04-03 21:31 ` Ezra Nugroho
2003-04-03 19:13 Neil Schemenauer
2003-04-03 15:45 Jonathan Vardy
2003-04-03 18:05 ` Peter L. Ashford
2003-04-03 18:47 ` Ross Vandegrift
2003-04-03 19:22 ` Stephan van Hienen
2003-04-03 19:20 ` Stephan van Hienen
2003-04-03 19:28 ` Alan Cox
2003-04-03 21:02 ` Ezra Nugroho
2003-04-03 21:25 ` Stephan van Hienen
2003-04-03 21:38 ` Peter L. Ashford
2003-04-03 22:09 ` Jonathan Vardy
2003-04-03 22:16 ` Jonathan Vardy
2003-04-03 22:28 ` Peter L. Ashford
2003-04-03 21:42 ` Jonathan Vardy
2003-04-03 22:13 ` Peter L. Ashford
2003-04-04 20:39 ` H. Peter Anvin
2003-04-03 21:06 ` Felipe Alfaro Solana
2003-04-03 21:14 ` Jonathan Vardy
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