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From: Alasdair G Kergon <agk@redhat.com>
To: LVM general discussion and development <linux-lvm@redhat.com>
Subject: Re: [linux-lvm] Move pvmove questions Was: Need help with a	particular use-case for pvmove.
Date: Thu, 18 Nov 2010 20:12:22 +0000	[thread overview]
Message-ID: <20101118201222.GD30435@agk-dp.fab.redhat.com> (raw)
In-Reply-To: <AANLkTinDcZ1k1za=yN6=JSXkCkSxGZQJ38MJ4F4O=EvP@mail.gmail.com>

On Thu, Nov 18, 2010 at 01:30:11PM -0500, Stirling Westrup wrote:
> I do think the fact that pvmove does no user-visible checkpointing is
> a bug.

The man page explains how pvmove works.  No data is removed until it
is safely available in its new location.

Checkpoints are done after each contiguous piece of data to move.
So if your data is contiguous, you'll get no checkpoints.
The code was designed to handle more-frequent checkpoints in such
cases, but nobody's seen the need to implement that feature yet.
(I don't think we even have a bugzilla requesting it.)

Alasdair

  reply	other threads:[~2010-11-18 20:12 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-11-15 19:53 [linux-lvm] Move pvmove questions Was: Need help with a particular use-case for pvmove Stirling Westrup
2010-11-15 21:47 ` Lars Ellenberg
2010-11-15 22:27   ` Stirling Westrup
2010-11-15 23:21     ` Stuart D. Gathman
2010-11-16  6:25 ` Luca Berra
2010-11-18 18:30   ` Stirling Westrup
2010-11-18 20:12     ` Alasdair G Kergon [this message]
2010-11-18 20:40       ` Stirling Westrup
2010-11-18 21:32         ` Alasdair G Kergon
2010-11-18 22:06           ` Stirling Westrup
2011-01-18 18:35             ` [linux-lvm] Move pvmove questions Stuart D Gathman
2010-11-19 21:56         ` [linux-lvm] Move pvmove questions Was: Need help with a particular use-case for pvmove Stuart D. Gathman
2010-11-19 22:25           ` Stirling Westrup
2010-11-21 14:17           ` Sven Eschenberg

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