Hello Marc and all, On Mon, Nov 04, 2013 at 06:51:11PM -0800 Marc MERLIN wrote: > On Sun, Nov 03, 2013 at 12:50PM +0100, Matthias G. Eckermann wrote: > > On Mon, Oct 14, 2013 at 21:05 David Madden wrote: > > > > > I'd like to use BTRFS to do something like the old NetApp > > > snapshot system: every hour or so, there'd be a snapshot, > > > then the 23 of the snapshots during a day would be > > > deleted, leaving just a day snapshot, then after a month, > > > 6 of 7 snapshots would be deleted, leaving just a week > > > snapshot, and so on. > > > > This is implemented in "Snapper", see: > > http://snapper.io/ > > It's by default delivered with openSUSE and SUSE Linux > > Enterprise, binaries are available for "everything else" > > as well. > > Just curious, what does it do more than the 20 line shellscript I > posted? > http://marc.merlins.org/linux/scripts/btrfs_snaps You asked ... Snapper does not only handle snapshotting itself, but a lot of steps around it, to make it easier for an administrator to handle snapshotting. While primarily offering a cmdline utility, Snapper also has integration into D-BUS, thus other tools can ask for snapshots on a specific subvolume. To make this secure, access rights are stored in a per subvolume configuration among other attributes and rules. Based on that Snapper offers (rough summary): - Managing configurations (create, delete, list, ...) - Managing snapshots (create, delete, list) - Add and modify metadata of snapshots - Compare snapshots aka "diff" - Roll-back snapshots (selective roll-back, per file) Within the configuration you can add - rules for creation and removal of snapshots - access rights Off-Topic: Snapper also works with DM based snapshots. Other projects using snapper: * Samba 4 has a prototype implementation of Windows' FSRVP server for SMB share shadow-copies ("snapshots") using Snapper via D-Bus. See: http://snapper.io/videos.html * The Systems Management stack of openSUSE / SUSE Linux Enterprise (ZYpp, YaST) uses Snapper automatically, if "/" is on btrfs. <SelfAdulation> One also can use it for regular snapshots to the $HOME directory; see my description here: https://www.suse.com/communities/conversations/menu-du-jour-vivaneau-vert-sur-lit-de-legumes-au-beurre-et-supremes-de-pamplemousse-2/ and here https://www.suse.com/communities/conversations/sieste-siesta/ </SelfAdulation> Hope this explains. so long - MgE -- Matthias G. Eckermann, Berlin, Germany Private : matthias.g.eckermann@xxxxxxxxxxx Business: mge@xxxxxxxx -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
