From: Mike Snitzer <snitzer@redhat.com>
To: Alasdair G Kergon <agk@redhat.com>
Cc: device-mapper development <dm-devel@redhat.com>,
Andi Kleen <andi@firstfloor.org>
Subject: Re: [PATCH v3 00/12] snapshot-merge target
Date: Thu, 19 Nov 2009 12:45:52 -0500 [thread overview]
Message-ID: <20091119174551.GA5852@redhat.com> (raw)
In-Reply-To: <20091119145338.GF6644@agk-dp.fab.redhat.com>
On Thu, Nov 19 2009 at 9:53am -0500,
Alasdair G Kergon <agk@redhat.com> wrote:
> On Thu, Nov 19, 2009 at 09:02:33AM -0500, Mike Snitzer wrote:
> > DM (and LVM) snapshot merging allows a snapshot (its COW store) to be
> > merged back into the snapshot's origin device.
> > One expected use of snapshot merging is rollback of a root filesystem
> > after system upgrades (e.g.: yum update).
>
> Has the patch to 'Documentation/device-mapper' been written yet?
> (It won't go upstream until we have that of course. Same for the
> replicator and any other new dm targets.)
Nope, I'll work on that (and adding comments like Andi suggested). I'll
include these changes into the v4 snapshot-merge patchset submission
that I'll be getting out today. The v4 patchset will be based on v9 of
the handover patch that we worked on (which I just emailed to dm-devel).
Mike
next prev parent reply other threads:[~2009-11-19 17:45 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-11-17 16:12 [PATCH v3 00/12] snapshot-merge target Mike Snitzer
2009-11-17 16:12 ` [PATCH v3 01/12] dm exception store: add snapshot-merge specific methods Mike Snitzer
2009-11-17 16:12 ` [PATCH v3 02/12] dm exception store: snapshot-merge usage accounting Mike Snitzer
2009-11-17 16:12 ` [PATCH v3 03/12] dm snapshot: add snapshot-merge target Mike Snitzer
2009-11-17 16:12 ` [PATCH v3 04/12] dm snapshot: merge target should not allocate new exceptions Mike Snitzer
2009-11-17 16:12 ` [PATCH v3 05/12] dm snapshot: do not allow more than one merging snapshot Mike Snitzer
2009-11-17 16:12 ` [PATCH v3 06/12] dm snapshot: the merge procedure Mike Snitzer
2009-11-17 16:12 ` [PATCH v3 07/12] dm snapshot: queue writes to an area that is actively being merged Mike Snitzer
2009-11-17 16:12 ` [PATCH v3 08/12] dm snapshot: do not merge a chunk until active writes to it finish Mike Snitzer
2009-11-17 16:12 ` [PATCH v3 09/12] dm snapshot: make exceptions in other snapshots when merging Mike Snitzer
2009-11-17 16:12 ` [PATCH v3 10/12] dm snapshot: make exceptions if merge is dispatching to origin Mike Snitzer
2009-11-17 16:12 ` [PATCH v3 11/12] dm snapshot: redirect accesses to origin if merging snap invalidated Mike Snitzer
2009-11-17 16:12 ` [PATCH v3 12/12] dm snapshot: merge a linear region of chunks using one large IO Mike Snitzer
2009-11-17 16:20 ` Mike Snitzer
2009-11-17 20:35 ` [PATCH v3 13/12] dm snapshot: avoid __minimum_chunk_size() during merge Mike Snitzer
2009-11-19 11:25 ` [PATCH v3 00/12] snapshot-merge target Andi Kleen
2009-11-19 14:02 ` Mike Snitzer
2009-11-19 14:53 ` Alasdair G Kergon
2009-11-19 17:45 ` Mike Snitzer [this message]
2009-11-19 16:08 ` Andi Kleen
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