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* dm: document when snapshot has finished mergingMike Snitzer2010-03-061-0/+44
| | | | | | | | Update Documentation/device-mapper/snapshot.txt to cover "How to determine when a snapshot has finished merging". Signed-off-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
* dm snapshot: add merge targetMikulas Patocka2009-12-101-5/+55
| | | | | | | | | | | | | | | | | The snapshot-merge target allows a snapshot to be merged back into the snapshot's origin device. One anticipated use of snapshot merging is the rollback of filesystems to back out problematic system upgrades. This patch adds snapshot-merge target management to both dm_snapshot_init() and dm_snapshot_exit(). As an initial place-holder, snapshot-merge is identical to the snapshot target. Documentation is provided. Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
* [PATCH] Fix dm-snapshot tutorial in DocumentationPaolo 'Blaisorblade' Giarrusso2005-11-071-2/+3
| | | | | | | | | | | | I've recently added this documentation, Alasdair gave some corrections, and here are some further corrections on top of his work (partly style issue, partly a technical error due to different past experience, partly a note which I've added - i.e. transient snapshots are lighter). Cc: Alasdair G Kergon <agk@redhat.com> Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Add dm-snapshot tutorial in DocumentationPaolo 'Blaisorblade' Giarrusso2005-09-221-0/+73
I've recently discovered the real functionality of device-mapper snapshots, and since they are not well known, I've decided to write some docs for them. Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Alasdair G Kergon <agk@redhat.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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