From: Jordan Russell <jr-list-2007@quo.to>
To: linux-raid@vger.kernel.org
Subject: Re: MD RAID1 performance very different from non-RAID partition
Date: Wed, 19 Sep 2007 00:28:47 -0500 [thread overview]
Message-ID: <46F0B38F.8070901@quo.to> (raw)
In-Reply-To: <20070918134438.GA1522@percy.comedia.it>
Luca Berra wrote:
> On Mon, Sep 17, 2007 at 10:58:11AM -0500, Jordan Russell wrote:
>> Goswin von Brederlow wrote:
>>> Compare the read ahead settings.
>> I'm not sure what you mean. There's a per-mount read ahead setting?
>>
>
> per device
>
> compare
> blockdev --getra /dev/sda2
> and
> blockdev --getra /dev/md0
Ah.
256 on /dev/sda2 with md0 stopped
256 on /dev/sda2 with md0 active
256 on /dev/md0 with md0 active
--
Jordan Russell
prev parent reply other threads:[~2007-09-19 5:28 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
2007-09-18 13:44 ` Luca Berra
2007-09-19 5:28 ` Jordan Russell [this message]
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