On Wed, Sep 11, 2013 at 12:55 PM, David Disseldorp <ddiss@xxxxxxx> wrote: > Hi Sage, > > On Wed, 11 Sep 2013 09:18:13 -0700 (PDT) > Sage Weil <sage@xxxxxxxxxxx> wrote: > >> > REFLINKs (inode-based writeable snapshots) >> >> This is the one item on this list I see that the ceph-osds could take real >> advantage of; it would make object clones triggered by things like RBD >> snapshots faster. What is missing from this list that would be similarly >> (or more) useful is a volume/fs snapshot feature. > > I must be missing something here, but I don't see how this would offer > any advantage over Btrfs, which provides the same feature via > BTRFS_IOC_CLONE and BTRFS_IOC_CLONE_RANGE. Yep, we do that on btrfs. Sage was just looking at things we could use which aren't part of the standard POSIX spec. This could give ocfs2 an advantage over xfs/ext4 if we implemented that awareness. -Greg Software Engineer #42 @ http://inktank.com | http://ceph.com -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
