HI I use GELI with ZFS all the time. Works fine for me so far.
Am 31.07.12 21:54, schrieb Robert Milkowski: >> Once something is written deduped you will always use the memory when >> you want to read any files that were written when dedup was enabled, so >> you do not save any memory unless you do not normally access most of >> your data. > > For reads you don't need ddt. Also in Solaris 11 (not in Illumos > unfortunately AFAIK) on reads the in-memory ARC will also stay deduped (so > if 10x logical blocks are deduped to 1 and you read all 10 logical copies, > only one block in arc will be allocated). If there are no further > modifications and you only read dedupped data, apart from disk space > savings, there can be very nice improvement in performance as well (less > i/o, more ram for caching, etc.). > > >> >> As far as the OP is concerned, unless you have a dataset that will >> dedup well don't bother with it, use compression instead (don't use >> both compression and dedup because you will shrink the average record >> size and balloon the memory usage). > > Can you expand a little bit more here? > Dedup+compression works pretty well actually (not counting "standard" > problems with current dedup - compression or not). > > _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
