From: "Bryn M. Reeves" <bmr@redhat.com>
To: Gianluca Cecchi <gianluca.cecchi@gmail.com>
Cc: LVM general discussion and development <linux-lvm@redhat.com>
Subject: Re: [linux-lvm] Convert striped lv to single pv on another disk?
Date: Thu, 13 Dec 2012 16:38:42 +0000 [thread overview]
Message-ID: <50CA0492.1050906@redhat.com> (raw)
In-Reply-To: <CAG2kNCwH-VKPVGyafcid8eSbg8uNZtNhqVs=GtGqKs21f6BHYA@mail.gmail.com>
On 13/12/12 16:11, Gianluca Cecchi wrote:
> I found in another thread that the resulting LV with pvmove remains a
> striped one on only one disk as far as its structure is concerned...
> with degraded performance...
> Have you an example of pvmove command options to test to execute based
> on my test?
> So that I can verify with my loop devices?
Yes, you're right. You will end up with both stripes still present but
on a single disk.
The best I could do using pvmove was to move individual extents around
(!) to make the LV contiguous on-disk. Of course, this doesn't remove
the striping and inflates the number of segments since each pair of
striped extents effectively becomes a segment.
The lvconvert command also still accepts a -i <n> parameter but doesn't
do anything useful with it and doesn't report an error.
Regards,
Bryn.
next prev parent reply other threads:[~2012-12-13 16:38 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-13 13:32 [linux-lvm] Convert striped lv to single pv on another disk? Gianluca Cecchi
2012-12-13 15:28 ` Gianluca Cecchi
2012-12-13 15:39 ` Bryn M. Reeves
2012-12-13 16:11 ` Gianluca Cecchi
2012-12-13 16:38 ` Bryn M. Reeves [this message]
2012-12-14 18:33 ` Stuart D Gathman
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