Hi, > On Wed, Oct 6, 2010 at 10:14 AM, Brett Dikeman <brett.dike...@gmail.com> wrote: > > I'll have more to report in about a week, hopefully good news. Is > > there a way to measure the size of the lookup table? > > Answered my own question again, I think: > > # zdb -DD data > > DDT-sha256-zap-duplicate: 693 entries, size 994 on disk, 839 in core > DDT-sha256-zap-unique: 10712002 entries, size 354 on disk, 186 in core
So far I didn't know about zdb, so I tried out the above command on one of my pools with which I sometimes have, well, some minor problems: The pool is a raidz1 with 3x500GB discs on which I once had dedup enabled. On each disc case there's a green light on the front indicating I/O. Since a couple of weeks sometimes an application hangs for a random amount of seconds. Not always the same app, but quite different. One time it is Eclipse, then it's Thunderbird, Firefox, a command entered in Gnome Terminal etc. The corresponding window is darkened in case of a hang, and at the same time you can see the pools disc case lights blinking, i.e. I/O. I've read in the OpenSolaris forums that b134 (which I was running) has some issues with dedup. Therefore I turned dedup off, moved the datasets on that pool to a different location, destroyed them on the original location, and then finally moved them back to (hopefully) get rid of dedup'ed data blocks. Well, at least "zpool list" now shows a dedup ratio of 1.00. After entering the above command, the output looks a bit strange to me: thors...@opensolaris:~$ pfexec zdb -DD daten DDT-sha256-zap-unique: 5 entries, size 123986329 on disk, 118375219 in core DDT histogram (aggregated over all DDTs): bucket allocated referenced ______ ______________________________ ______________________________ refcnt blocks LSIZE PSIZE DSIZE blocks LSIZE PSIZE DSIZE ------ ------ ----- ----- ----- ------ ----- ----- ----- 1 5 5K 5K 6.66K 5 5K 5K 6.66K Total 5 5K 5K 6.66K 5 5K 5K 6.66K dedup = 1.00, compress = 1.00, copies = 1.33, dedup * compress / copies = 0.75 thors...@opensolaris:~$ What does this mean? Is there an error somewhere in the pool? If yes, how can I find out where and how to get rid of it? How can I find out if there's still some dedup'ed data somewhere? Regards Thorsten _______________________________________________ OpenIndiana-discuss mailing list OpenIndiana-discuss@openindiana.org http://openindiana.org/mailman/listinfo/openindiana-discuss