From: Jordan Russell <jr-list-2007@quo.to>
To: Goswin von Brederlow <brederlo@informatik.uni-tuebingen.de>
Cc: linux-raid@vger.kernel.org
Subject: Re: MD RAID1 performance very different from non-RAID partition
Date: Mon, 17 Sep 2007 10:58:11 -0500 [thread overview]
Message-ID: <46EEA413.8090706@quo.to> (raw)
In-Reply-To: <878x765kmy.fsf@informatik.uni-tuebingen.de>
Goswin von Brederlow wrote:
> Jordan Russell <jr-list-2007@quo.to> writes:
>> It's an ext3 partition, so I guess that doesn't apply?
>>
>> I tried remounting /dev/sda2 with the "barrier=0" option (which I assume
>> disables barriers, looking at the source), though, just to see if it
>> would make any difference, but it didn't; the database build still took
>> 31 minutes.
>
> Compare the read ahead settings.
I'm not sure what you mean. There's a per-mount read ahead setting?
--
Jordan Russell
next prev parent reply other threads:[~2007-09-17 15:58 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-09-15 5:28 MD RAID1 performance very different from non-RAID partition Jordan Russell
2007-09-15 7:09 ` Iustin Pop
2007-09-15 12:18 ` Goswin von Brederlow
2007-09-15 12:32 ` Iustin Pop
2007-09-15 18:11 ` Jordan Russell
2007-09-16 22:08 ` Goswin von Brederlow
2007-09-17 15:58 ` Jordan Russell [this message]
2007-09-18 13:44 ` Luca Berra
2007-09-19 5:28 ` Jordan Russell
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