On Tue, May 05, 2009 at 11:12:36PM +0100, Jamie Lokier wrote: > Joel Becker wrote: > > The point-in-time of the snapshot is what's important here. > > Don't we have a slight problem that useful point-in-time snapshots > really need to snapshot whole directory trees? Otherwise you get the > same inter-file inconsistency issues that you get intra-file from old > fashioned copying. Snapshotting whole trees is already doable from things like btrfs and from whole volumes on your storage. This is a different beast. Inter-file is a lot easier to handle than intra-file, because you have control over that part of the process. And if your file is actually a disk image, you get snapping of disks for free :-) Joel -- "We'd better get back, `cause it'll be dark soon, and they mostly come at night. Mostly." Joel Becker Principal Software Developer Oracle E-mail: joel.becker@xxxxxxxxxx Phone: (650) 506-8127 -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
