From: Alasdair G Kergon <agk@redhat.com>
To: LVM general discussion and development <linux-lvm@redhat.com>
Subject: Re: [linux-lvm] Progress on LVM2 snapshots
Date: Fri, 29 Jul 2005 21:47:57 +0100 [thread overview]
Message-ID: <20050729204757.GP23710@agk.surrey.redhat.com> (raw)
In-Reply-To: <1122572640.9888.27.camel@localhost.localdomain>
On Thu, Jul 28, 2005 at 01:44:00PM -0400, Ming Zhang wrote:
> 1) very hard to solve technically. or
> 2) not so easy but doable, just no time and human resource?
The hardest part of the fix involves changing the sequence of
device-mapper ioctls that LVM2 uses, and that's a couple of weeks'
development work, now pencilled into the RHEL4 Update 3 timescale.
In the meantime, you can apply the snapshot patches in the -udm
tree and use 'dmsetup' manually to activate and deactivate snapshots
when lvm2 fails.
Patches 8 and 9 at:
ftp://sources.redhat.com/pub/dm/patches/2.6-unstable/2.6.12-rc2/2.6.12-rc2-udm1/
(Further patches are needed, but those two plus correct dmsetup use
should avoid machine lockups.)
Alasdair
--
agk@redhat.com
next prev parent reply other threads:[~2005-07-29 20:47 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-06-20 11:45 [linux-lvm] Progress on LVM2 snapshots Mukund
2005-07-28 17:44 ` Ming Zhang
2005-07-28 20:06 ` Jonathan E Brassow
2005-07-28 20:26 ` Ming Zhang
2005-07-28 20:45 ` Jonathan E Brassow
2005-07-28 20:50 ` Ming Zhang
2005-07-29 20:47 ` Alasdair G Kergon [this message]
2005-07-29 21:13 ` Ming Zhang
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