On Mon, Aug 12, 2013 at 09:21:17AM +0200, Valerio Pachera wrote: > 2013/8/12 Liu Yuan <namei.unix at gmail.com>: > > This is what copy-on-write takes from you when it saves you a lot of space by > > sharing objects between snapshots. > > Confirmed. > I've been taking a snapshot of vdi 'backup' and write speed dop down to ~6 M/s. Note, only first write will be slowed down. After that, performace will go as normal as non-cloned vdi. > > Do you also confirm the the write speed do not decrease, increasing > the number of snapshots? (inversely proportional). > (From what I see, it doesn't change). vdi snapshot number doesn't affect performance of any vdi on the snapshot chain. Thanks Yuan |