On Tue, 22 Jul 2008, Miles Nordin wrote: > scrubs making pools uselessly slow? Or should it be scrub-like so > that already-written filesystems can be thrown into the dedup bag and > slowly squeezed, or so that dedup can run slowly during the business > day over data written quickly at night (fast outside-business-hours > backup)?
I think that the scrub-like model makes the most sense since ZFS write performance should not be penalized. It is useful to implement score-boarding so that a block is not considered for de-duplication until it has been duplicated a certain number of times. In order to decrease resource consumption, it is useful to perform de-duplication over a span of multiple days or multiple weeks doing just part of the job each time around. Deduping a petabyte of data seems quite challenging yet ZFS needs to be scalable to these levels. Bob ====================================== Bob Friesenhahn [EMAIL PROTECTED], http://www.simplesystems.org/users/bfriesen/ GraphicsMagick Maintainer, http://www.GraphicsMagick.org/ _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
