On Tue, Nov 17, 2009 at 2:48 AM, Jeff Garzik <jgarzik@xxxxxxxxx> wrote: > On 11/17/2009 02:43 AM, nodata wrote: >> >> Am 2009-11-17 01:55, schrieb Chris Ball: >>> >>> Hi, >>> >>> I've written up a draft of an F13 filesystem rollback feature using >>> Btrfs snapshots that are automatically created by yum: >>> >>> https://fedoraproject.org/wiki/Features/SystemRollbackWithBtrfs >>> >>> It'd be great to get feedback on whether this is the right idea, and >>> how exactly the UI interaction should work, before submitting this >>> formally. >>> >>> Thanks! >>> >>> - Chris. >> >> So this will confuse things a lot if the user doesn't have only rpm >> stuff on one partition, and everything else on another. This is >> potentially a major risk. How would that be handled? > > Mr. nodata, > > As the URL notes under "Detailed Description," that is not handled at all. > It wraps all file I/O, yum or not, into the snapshot. > > A bloody awful solution, especially when you consider that btrfs' maintainer > Chris Mason is adding support for real userland transactions (via some > additional ioctls). > Yeah but you can't roll back userland transactions. Not to mention you are talking about an interface that may change quite a bit over the next year. We have snapshotting abilities now, and yes it's a big hammer, but just because its a bit of a blunt instrument doesn't mean we shouldn't take advantage of it. Thanks, Josef -- fedora-devel-list mailing list fedora-devel-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/fedora-devel-list
