> From: Daniel Carosone [mailto:d...@geek.com.au] > Sent: Thursday, May 26, 2011 8:19 PM > > Once your data is dedup'ed, by whatever means, access to it is the > same. You need enough memory+l2arc to indirect references via > DDT.
I don't think this is true. The reason you need arc+l2arc to store your DDT is because when you perform a write, the system will need to check and see if that block is a duplicate of an already existing block. If you dedup once, and later disable dedup, the system won't bother checking to see if there are duplicate blocks anymore. So the DDT won't need to be in arc+l2arc. I should say "shouldn't." _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
