From: Richard Scobie <richard@sauce.co.nz>
To: Linux RAID Mailing List <linux-raid@vger.kernel.org>
Subject: Re: LVM performance
Date: Mon, 10 Mar 2008 13:59:59 +1300 [thread overview]
Message-ID: <47D4880F.8050309@sauce.co.nz> (raw)
In-Reply-To: <7F70AB26-25B7-4127-A3A9-62D104B7A80F@it-loops.com>
Michael Guntsche wrote:
> That's true but only if you create a XFS filesystem on the md device
> directly. If LVM is in between mkfs.xfs cannot figure it out and you
> have to specify the values yourself.
I wondered about that after I wrote and found this in the mkfs.xfs man page:
"sw=value
suboption is an alternative to using swidth. The sw suboption is used
to specify the stripe width for a RAID device or striped logical
volume. The value is expressed as a multiplier of the stripe unit,
usually the same as the number of stripe members in the logical volume
configuration, or data disks in a RAID device.
When a filesystem is created on a logical volume device, mkfs.xfs will
automatically query the logical volume for appropriate sunit and swidth
values."
So perhaps it'll do the same on LVM?
Regards,
Richard
next prev parent reply other threads:[~2008-03-10 0:59 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-02-17 3:58 RAID5 to RAID6 reshape? Beolach
2008-02-17 11:50 ` Peter Grandi
2008-02-17 14:45 ` Conway S. Smith
2008-02-18 5:26 ` Janek Kozicki
2008-02-18 12:38 ` Beolach
2008-02-18 14:42 ` Janek Kozicki
2008-02-19 19:41 ` LVM performance (was: Re: RAID5 to RAID6 reshape?) Oliver Martin
2008-02-19 19:52 ` Jon Nelson
2008-02-19 20:00 ` Iustin Pop
2008-02-19 23:19 ` LVM performance Peter Rabbitson
2008-02-20 12:19 ` LVM performance (was: Re: RAID5 to RAID6 reshape?) Peter Grandi
2008-02-22 13:41 ` LVM performance Oliver Martin
2008-03-07 8:14 ` Peter Grandi
2008-03-09 19:56 ` Oliver Martin
2008-03-09 21:13 ` Michael Guntsche
2008-03-09 23:27 ` Oliver Martin
2008-03-09 23:53 ` Michael Guntsche
2008-03-10 8:54 ` Oliver Martin
2008-03-10 21:04 ` Peter Grandi
2008-03-12 14:03 ` Michael Guntsche
2008-03-12 19:54 ` Peter Grandi
2008-03-12 20:11 ` Guntsche Michael
2008-03-10 0:32 ` Richard Scobie
2008-03-10 0:53 ` Michael Guntsche
2008-03-10 0:59 ` Richard Scobie [this message]
2008-03-10 1:21 ` Michael Guntsche
2008-02-18 19:05 ` RAID5 to RAID6 reshape? Peter Grandi
2008-02-20 6:39 ` Alexander Kühn
2008-02-22 8:13 ` Peter Grandi
2008-02-23 20:40 ` Nagilum
2008-02-25 0:10 ` Peter Grandi
2008-02-25 16:31 ` Nagilum
2008-02-17 13:31 ` Janek Kozicki
2008-02-17 16:18 ` Conway S. Smith
2008-02-18 3:48 ` Neil Brown
2008-02-17 22:40 ` Mark Hahn
2008-02-17 23:54 ` Janek Kozicki
2008-02-18 12:46 ` Andre Noll
2008-02-18 18:23 ` Mark Hahn
2008-02-17 14:06 ` Janek Kozicki
2008-02-17 23:54 ` cat
2008-02-18 3:43 ` Neil Brown
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