Joel Becker wrote: > On Tue, May 05, 2009 at 10:57:11PM +0100, Jamie Lokier wrote: > > jim owens wrote: > > > 3) the granularity of the COW (1-byte write may cause > > > 1-block up through whole file copy) is fs-dependent. > > > > And yet ENOSYS if the fs cannot implement any COW, and it isn't > > possible for userspace to duplicate the semantics by explicit copying? > > 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. -- Jamie -- 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
