> > Specifically, I was trying to compare ZFS snapshots with LVM snapshots on > > Linux. One of the tests does writes to an ext3FS (that's on top of an LVM > > snapshot) mounted synchronously, in order to measure the real > > Copy-on-write overhead. So, I was wondering if I could do the same with > > ZFS. Seems not. > > Given that ZFS does COW for *all* writes, what does this test actually intend > to show when running on ZFS? Am I missing something, or should not writes to > a clone be as fast, or even faster, than a write to a non-clone? Given that > COW is always performed, but in the case of the clone the old data is not > removed. >
well, yes - for ZFS. But not the case with LVM snapshots. Doing the same (sync mount) on ZFS was just for comparing them on similar grounds. Anyways, I figured ZFS performs way better. _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
