On Wed, Aug 03, 2011 at 12:32:56PM -0700, Brandon High wrote: > On Mon, Aug 1, 2011 at 4:27 PM, Daniel Carosone <d...@geek.com.au> wrote: > > The other thing that can cause a storm of tiny IOs is dedup, and this > > effect can last long after space has been freed and/or dedup turned > > off, until all the blocks corresponding to DDT entries are rewritten. > > I wonder if this was involved here. > > Using dedup on a pool that houses an Oracle DB is Doing It Wrong in so > many ways...
Indeed, but alas people still Do It Wrong. In particular, when a pool is approaching full, turning on dedup might seem like an attractive proposition to someone who doesn't understand the cost. So i just wonder if they have, or had at some time past, enabed it. -- Dan.
pgpNRTzK8WULH.pgp
Description: PGP signature
_______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
