Feature changed by: Arvin Schnell (aschnell) Feature #312974, revision 8 Title: Add Ext4 LVM snapshot support to Snapper. openSUSE Distribution: Unconfirmed Priority Requester: Desirable Requested by: Roger Luedecke (shadowolf7) Partner organization: openSUSE.org Description: Very simple. The way Snapper can work on Btrfs, enable it to work that way with the backup snapshots of Ext4 filesystems using Logical Volume Management. Discussion: #1: Joseph Mitzen (duncreg) (2011-11-21 01:07:43) I haven't checked out 12.1 yet, but doesn't it work this way already? If not, it should. There was a Google Summer Of Code project to add ext4 support to snapper. At http://en.opensuse.org/openSUSE:Upcoming_features#Snapper.2C_Btrfs_snapshot_... we find "GSoC Projects... Add ext4 snapshots support to snapper " I checked around online and although openSUSE never mentioned this project again in its newsletter, it seems the person doing it did get the code done based on his blog entries. So the question I have is if snapper doesn't work with ext4 (and none of the promotional material mentions it does), what happened? It looks like everything should be done but it was only mentioned once like it "went black" and became a covert project or something. :-) + #2: Arvin Schnell (aschnell) (2011-11-21 10:20:23) (reply to #1) + The GCoS project was a failure. Nevertheless I have later added + experimental ext4 support to snapper. But you need a special kernel and + tools for ext4 snapshot support. Thus we do not promote it like for + btrfs. + If you are interested in ext4 snapshots look at the next4-devel project + and help to get the support included in the default kernel. + #3: Arvin Schnell (aschnell) (2011-11-21 10:22:49) + We have to distinguish between LVM and ext4 support in snapper. + * LVM support in snapper (making LVM snapshots) is currently no option. + LVM snapshots do not dynamically share a storage pool and many + snapshots ruin performance. With snapper you easily have 100 snapshots. + This simply does not work together. + There is active development to remedy those drawbacks of LVM snapshots. + * Ext4 snapshots in snapper should work. One thing missing is proper + mount/umount handling of the snapshots. -- openSUSE Feature: https://features.opensuse.org/312974

Feature changed by: Karl Cheng (qantas94heavy) Feature #312974, revision 12 Title: Add Ext4 LVM snapshot support to Snapper. - openSUSE Distribution: Unconfirmed + openSUSE Distribution: New Priority Requester: Desirable Requested by: Roger Luedecke (shadowolf7) Partner organization: openSUSE.org Description: Very simple. The way Snapper can work on Btrfs, enable it to work that way with the backup snapshots of Ext4 filesystems using Logical Volume Management. Relations: - Snapper and LVM thin-provisioned Snapshots (url: http://lizards.opensuse.org/2012/07/25/snapper-lvm/) Discussion: #1: Joseph Mitzen (duncreg) (2011-11-21 01:07:43) I haven't checked out 12.1 yet, but doesn't it work this way already? If not, it should. There was a Google Summer Of Code project to add ext4 support to snapper. At http://en.opensuse.org/openSUSE:Upcoming_features#Snapper.2C_Btrfs_snapshot_... we find "GSoC Projects... Add ext4 snapshots support to snapper " I checked around online and although openSUSE never mentioned this project again in its newsletter, it seems the person doing it did get the code done based on his blog entries. So the question I have is if snapper doesn't work with ext4 (and none of the promotional material mentions it does), what happened? It looks like everything should be done but it was only mentioned once like it "went black" and became a covert project or something. :-) #2: Arvin Schnell (aschnell) (2011-11-21 10:20:23) (reply to #1) The GCoS project was a failure. Nevertheless I have later added experimental ext4 support to snapper. But you need a special kernel and tools for ext4 snapshot support. Thus we do not promote it like for btrfs. If you are interested in ext4 snapshots look at the next4-devel project and help to get the support included in the default kernel. #3: Arvin Schnell (aschnell) (2011-11-21 10:22:49) We have to distinguish between LVM and ext4 support in snapper. * LVM support in snapper (making LVM snapshots) is currently no option. LVM snapshots do not dynamically share a storage pool and many snapshots ruin performance. With snapper you easily have 100 snapshots. This simply does not work together. There is active development to remedy those drawbacks of LVM snapshots. * Ext4 snapshots in snapper should work. One thing missing is proper mount/umount handling of the snapshots. #4: Arvin Schnell (aschnell) (2012-08-08 10:46:54) LVM now provides thin-provisioning. Experimental support has been added to snapper. For support in SLES there exists fate #313860. -- openSUSE Feature: https://features.opensuse.org/312974