On Tuesday 22 April 2008, Evgeniy Polyakov wrote: > Hi. > > On Tue, Apr 22, 2008 at 04:55:37PM -0400, Chris Mason (chris.mason@xxxxxxxxxx) wrote: > > > The transactions generally look like > > > > > > write(a) > > > setxattr(a) > > > write(b) > > > setxattr(b) > > > > Hmm, is this whole thing the atomic unit, or can a and b be done > > separately? > > No, main idea is to bind very different operations together and make > them look atomic from userspace point of view. But transactions are > nothing without ability to correctly unroll them on demand. > Transaction can include any operation with data and metadata. Transaction rollback from a filesystem point of view is a reboot. Real database style transactions with rollback and isolation from other procs etc etc are outside the scope of Btrfs. -chris -- 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
