Re: ZFS Write Lockup

2011-10-05 Thread Daniel Staal
--As of October 4, 2011 2:43:45 AM -0400, Dave Cundiff is alleged to have said: I don't know what triggers the problem but I know how to fix it. If I perform a couple snapshot deletes the IO will come back in line every single time. Fortunately I have LOTS of snapshots to delete. [root@san2

Re: ZFS Write Lockup

2011-10-05 Thread Dave Cundiff
On Wed, Oct 5, 2011 at 5:52 PM, Daniel Staal dst...@usa.net wrote: --As of October 4, 2011 2:43:45 AM -0400, Dave Cundiff is alleged to have said: I don't know what triggers the problem but I know how to fix it. If I perform a couple snapshot deletes the IO will come back in line every

Re: ZFS Write Lockup

2011-10-05 Thread Daniel Staal
--As of October 5, 2011 6:37:17 PM -0400, Dave Cundiff is alleged to have said: Its for a backup service I've been working on. It takes a snapshot hourly of all 17 zvols. I was planning on keeping them for a month. I had the same thought about the snapshots and deleted them all yesterday.

ZFS Write Lockup

2011-10-04 Thread Dave Cundiff
Hi, I'm running 8.2-RELEASE and running into an IO lockup on ZFS that is happening pretty regularly. The system is stock except for the following set in loader.conf vm.kmem_size=30G vfs.zfs.arc_max=22G kern.hz=100 I know the kmem settings aren't SUPPOSED to be necessary now, buy my ZFS boxes

Re: ZFS Write Lockup

2011-10-04 Thread Dave Cundiff
Hi, Decided to cross post this over here as well since it seems like it could be something actually wrong and not me being an idiot. Feel free to let me know if I'm an idiot. :) gstat is showing almost no IO hitting da1 which is my zpool(21 disk raid50 3x7). Yet the zvols are all backed up.