From: Mike Snitzer <snitzer@redhat.com>
To: Franck Routier <alci@mecadu.org>
Cc: LVM general discussion and development <linux-lvm@redhat.com>
Subject: Re: [linux-lvm] Trim support on stripped volumes ?
Date: Tue, 24 May 2011 09:14:52 -0400 [thread overview]
Message-ID: <20110524131451.GB27519@redhat.com> (raw)
In-Reply-To: <1306230666.2195.10.camel@franck-VPCCW2S1E>
On Tue, May 24 2011 at 5:51am -0400,
Franck Routier (personnel) <alci@mecadu.org> wrote:
> I found this commit
> http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=7b76ec11fec40203836b488496d2df082d5b2022
> that suggests it could work, but I'm not sure at all...
Yes, that is the commit that added discard support to the stripe target,
it works.
> Le mardi 24 mai 2011 � 11:20 +0200, Franck Routier (personnel) a �crit :
> > Hi,
> >
> > I have set-up of server with 4 SSDs (OCZ Vertex 2) stripped using LVM.
> > Logical volume has been created using the -i 4 option (iostat confirms
> > that the 4 disks work in parallel when I write a file).
> >
> > Ext4 fs is used on the volume, mounted with -discard option.
When using -o discard, ext4 will log a warning if a discard failed (and
will disable discards).
So ext4 is a great indicator for whether discards are working on your
striped LV volume.
Mike
next prev parent reply other threads:[~2011-05-24 13:14 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-24 9:20 [linux-lvm] Trim support on stripped volumes ? Franck Routier (personnel)
2011-05-24 9:51 ` Franck Routier (personnel)
2011-05-24 13:14 ` Mike Snitzer [this message]
2011-05-25 8:11 ` Franck Routier (personnel)
2011-05-25 13:23 ` Mike Snitzer
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