The issue is likely related to the bug you referenced, which I'm working on a fix for.
For future reference, a more complete thread listing can be obtained with "::stacks -m zfs". --matt On Sun, Nov 18, 2012 at 1:55 PM, Chris Nagele <[email protected]> wrote: > I've been running into an issue with zfs file systems hanging/freezing > during our backup processes. > > We currently perform backups to two servers, an onsite server and an > offsite server. What we found is that when a single process is > creating the snap, sending it and deleting an older snap it works > fine. However, if we add the second process to do the same thing to > the offsite server, we get a stuck process on the snapshot delete that > cannot be killed. From what I can tell, the problem occurs when we > attempt to delete any snapshot while a "zfs send" is in progress. > > Some things to note: > > * Only the volume with the stuck process freezes. Accessing files is > fine, only ZFS commands are stuck. > * We used different snapshot names, so the delete and send in both > processes were not using the same snaps. > * We also tried tiering where we would send snaps from the onsite > backup server, but processes still froze. > * We are using OmniOS. > > After some advising from Omni I used mdb to walk the threads. Here is > the output: > > http://pastie.org/private/xism3bd6qixbfaugprqyqw > > They also mentioned it might be related to this bug: > > https://www.illumos.org/issues/2807 > > I attempted to do a crashdump, but after 30 minutes it was only 8% > complete and we had to force the reboot. The box has 198GB of RAM, so > I assume it was taking a while due to that. > > Does anyone know more about this issue? I am trying to figure out a > way that I can run tiered backups to multiple locations without > locking zfs. > > Thanks, > Chris > > > ------------------------------------------- > illumos-discuss > Archives: https://www.listbox.com/member/archive/182180/=now > RSS Feed: > https://www.listbox.com/member/archive/rss/182180/21175667-2019e749 > Modify Your Subscription: > https://www.listbox.com/member/?&; > Powered by Listbox: http://www.listbox.com > ------------------------------------------- illumos-discuss Archives: https://www.listbox.com/member/archive/182180/=now RSS Feed: https://www.listbox.com/member/archive/rss/182180/21175430-2e6923be Modify Your Subscription: https://www.listbox.com/member/?member_id=21175430&id_secret=21175430-6a77cda4 Powered by Listbox: http://www.listbox.com
