On Wed, Feb 24 2010 at 5:46pm -0500, Eric Brunson <brunson@brunson.com> wrote: > On 09/23/2009 03:40 PM, Alasdair G Kergon wrote: > >On Wed, Sep 23, 2009 at 03:04:22PM -0600, Eric Brunson wrote: > >>I remember seeing somewhere discussion of adding the ability to roll > >>back to a snapshot. I think of how cool this would be about ever six > >>months, usually coinciding with an impending Fedora release. ;-) > >The developers are just starting to submit their patch sequence to the > >development mailing lists (dm-devel and lvm-devel) for review. So > >that's targetting linux-next in the next few weeks ready for the 2.6.33 > >kernel. > > > > From the newly released 2.6.33 kernel changelog, does this mean what > I think it means? > > commit 53365383c4667aba55385cd1858582c19a7a8a36 > Merge: 51b736b d2fdb77 > Author: Linus Torvalds<torvalds@linux-foundation.org> > Date: Tue Dec 15 09:12:01 2009 -0800 > > Merge git://git.kernel.org/pub/scm/linux/kernel/git/agk/linux-2.6-dm > > * git://git.kernel.org/pub/scm/linux/kernel/git/agk/linux-2.6-dm: (80 commits) > dm snapshot: use merge origin if snapshot invalid > dm snapshot: report merge failure in status > dm snapshot: merge consecutive chunks together > dm snapshot: trigger exceptions in remaining snapshots during merge > dm snapshot: delay merging a chunk until writes to it complete > dm snapshot: queue writes to chunks being merged > dm snapshot: add merging > dm snapshot: permit only one merge at once > dm snapshot: support barriers in snapshot merge target > dm snapshot: avoid allocating exceptions in merge > dm snapshot: rework writing to origin > dm snapshot: add merge target > dm exception store: add merge specific methods > dm snapshot: create function for chunk_is_tracked wait > dm snapshot: make bio optional in __origin_write > ... > > > If it does, then I'm very excited. :-) Ha, yes the 2.6.33 kernel includes DM's new snapshot-merge target. LVM2 >= 2.02.59 provides userspace support for snapshot-merge (via lvconvert --merge). Though 2.02.61 adds the ability to tag N snapshots with a common tag and then merge them all back to their respective origin using: lvconvert --merge @tag Mike _______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
