Lance, This could be bug#*6596237 Stop looking and start ganging <http://monaco.sfbay/detail.jsf?cr=6596237>.* The fix is in progress and Victor Latushkin is working on it.
We have an IDR based on the patches 127127-11/127128-11 which has the first cut of the fix. You could raise an escalation and get these IDRs. Thanks and regards, Sanjeev. Lance wrote: > Any progress on a defragmentation utility? We appear to be having a severe > fragmentation problem on an X4500, vanilla S10U4, no additional patches. > 500GB disks in 4 x 11 disk RAIDZ2 vdevs. It hit 97% full and fell off a > cliff...about 50KB/sec on writes. Deleting files so the zpool is at 92% has > not helped. I rebooted the host...no difference. I lowered the recordsize > from 128KB to 8KB. That has boosted performance to 250-500KB/sec on writes > (still 10x-100x too slow). Reads have been fine all along. > > This is one big zpool and one file system of 16TB. Approximately 25-30M > files, some of which change often. Lots of small, changing files, which are > probably aggravating the problem. Due to the Marvell driver bug, I have SATA > NCQ turned off in /etc/system via "set sata:sata_func_enable=0x5". We plan > to go to the most recent patch set so I can remove that, but I'm not > convinced patching will fix the slowness we're seeing. > > We'll try to delete more files, but having a defragmentation utility might > help in this case. It seems a shame to waste 10-20% of your disk space to > maintain moderate performance, though I guess that's what we'll have to do. > > > This message posted from opensolaris.org > _______________________________________________ > zfs-discuss mailing list > zfs-discuss@opensolaris.org > http://mail.opensolaris.org/mailman/listinfo/zfs-discuss > -- Solaris Revenue Products Engineering, India Engineering Center, Sun Microsystems India Pvt Ltd. Tel: x27521 +91 80 669 27521 _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
