From: keld@keldix.com
To: Peter Grandi <pg@lxra2.to.sabi.co.UK>
Cc: Linux RAID <linux-raid@vger.kernel.org>, Linux fs XFS <xfs@OSS.SGI.com>
Subject: Re: raid10n2/xfs setup guidance on write-cache/barrier
Date: Thu, 15 Mar 2012 16:25:48 +0100 [thread overview]
Message-ID: <20120315152548.GA25194@www5.open-std.org> (raw)
In-Reply-To: <20321.63389.586851.689070@tree.ty.sabi.co.UK>
On Thu, Mar 15, 2012 at 02:07:25PM +0000, Peter Grandi wrote:
> >>> I want to create a raid10,n2 using 3 1TB SATA drives.
> >>> I want to create an xfs filesystem on top of it. The
> >>> filesystem will be used as NFS/Samba storage.
>
> Consider also an 'o2' layout (it is probably the same thing for a
> 3 drive RAID10) or even a RAID5, as 3 drives and this usage seems
> one of the few cases where RAID5 may be plausible.
Well, for a file server like NFS/Samba, you could also consider raid10,f2.
I would think you could get about double the read performance compared to n2 and o2
layouts, and also for individual read transfers on a running system
you would get somthing like double the read performance.
Write performance could be somewhat slower (0 to 10 %) bot as users
are not waiting for writes to complete, they will probably not notice.
best regards
keld
next prev parent reply other threads:[~2012-03-15 15:25 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-03-15 0:30 raid10n2/xfs setup guidance on write-cache/barrier Jessie Evangelista
2012-03-15 5:38 ` Stan Hoeppner
2012-03-15 12:06 ` Jessie Evangelista
2012-03-15 14:07 ` Peter Grandi
2012-03-15 15:25 ` keld [this message]
2012-03-15 16:52 ` Jessie Evangelista
2012-03-15 17:15 ` keld
2012-03-15 17:40 ` keld
2012-03-15 16:18 ` Jessie Evangelista
2012-03-15 23:00 ` Peter Grandi
2012-03-16 3:36 ` Jessie Evangelista
2012-03-16 11:06 ` Michael Monnerie
2012-03-16 12:21 ` Peter Grandi
2012-03-16 17:15 ` Brian Candler
2012-03-17 15:35 ` Peter Grandi
2012-03-17 21:39 ` raid10n2/xfs setup guidance on write-cache/barrier (GiB alignment) Zdenek Kaspar
2012-03-18 0:08 ` Peter Grandi
[not found] ` <4F64115D.50208@hardwarefreak.com>
[not found] ` <20120317223454.GQ5091@dastard>
2012-03-18 2:09 ` raid10n2/xfs setup guidance on write-cache/barrier Peter Grandi
2012-03-18 11:25 ` Peter Grandi
2012-03-18 14:00 ` Christoph Hellwig
2012-03-18 19:17 ` Peter Grandi
2012-03-19 9:07 ` Stan Hoeppner
2012-03-20 12:34 ` Jessie Evangelista
2012-03-18 18:08 ` Stan Hoeppner
2012-03-22 21:26 ` Peter Grandi
2012-03-23 5:10 ` Stan Hoeppner
2012-03-16 12:25 ` Stan Hoeppner
2012-03-16 18:01 ` Jon Nelson
2012-03-16 18:03 ` Jon Nelson
2012-03-16 19:28 ` Peter Grandi
2012-03-17 0:02 ` Stan Hoeppner
2012-03-17 22:10 ` Zdenek Kaspar
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