On Aug 18, 2010, at 5:11 AM, Paul Kraus wrote: > On Wed, Aug 18, 2010 at 7:51 AM, Peter Tribble <peter.trib...@gmail.com> > wrote: > >> I tried this with NetBackup, and decided against it pretty rapidly. >> Basically, we >> got hardly any dedup at all. (Something like 3%; compression gave us >> much better results.) Tiny changes in block alignment completely ruin the >> possibility of significant benefit. > > We are using Netbackup with ZFS Disk Stage under Solaris 10U8, > no dedupe but are getting 1.9x compression ratio :-) > >> Using ZFS dedup is logically the wrong place to do this; you want a decent >> backup system that doesn't generate significant amounts of duplicate data >> in the first place. > > The latest release of NBU (7.0) supports both client side and > server side dedupe (at additional cost ;-). We are using it in test > for backing up remote servers across slow WAN links with very good > results.
It is always better to manipulate data closer to the consumer of said data. Ideally, applications replicate, compress, and dedup their own data. -- richard -- Richard Elling rich...@nexenta.com +1-760-896-4422 Enterprise class storage for everyone www.nexenta.com _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
