From: "Keld Jørn Simonsen" <keld@dkuug.dk>
To: Holger Mauermann <mauermann@gmail.com>
Cc: linux-raid@vger.kernel.org
Subject: Re: LVM on raid10,f2 performance issues
Date: Wed, 3 Dec 2008 08:15:04 +0100 [thread overview]
Message-ID: <20081203071504.GA8161@rap.rap.dk> (raw)
In-Reply-To: <4935C4B3.2060404@gmail.com>
On Wed, Dec 03, 2008 at 12:28:51AM +0100, Holger Mauermann wrote:
> Keld Jørn Simonsen schrieb:
> > How is it if you use the raid10,f2 without lvm?
> > What are the numbers?
>
> After a fresh installation LVM performance is now somewhat better. I
> don't know what was wrong before. However, it is still not as fast as
> the raid10...
>
> dd on raw devices
> -----------------
>
> raid10,f2:
> read : 409 MB/s
> write: 212 MB/s
>
> raid10,f2 + lvm:
> read : 249 MB/s
> write: 158 MB/s
What is the performance with raid0?
What is the performance with a filesystem?
Did you try
blockdev --setra 65536 /dev/md3
How many disks are you using?
best regards
keld
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next prev parent reply other threads:[~2008-12-03 7:15 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-12-01 0:00 LVM on raid10,f2 performance issues Holger Mauermann
2008-12-01 16:42 ` Keld Jørn Simonsen
2008-12-02 23:28 ` Holger Mauermann
2008-12-03 7:15 ` Keld Jørn Simonsen [this message]
2008-12-03 9:43 ` Michal Soltys
2009-01-19 1:24 ` thomas62186218
2009-01-19 7:28 ` Peter Rabbitson
2009-01-26 19:06 ` Bill Davidsen
2009-01-19 7:30 ` Michal Soltys
2009-01-19 12:17 ` Keld Jørn Simonsen
2009-01-19 12:24 ` Peter Rabbitson
2009-01-19 13:59 ` Keld Jørn Simonsen
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