More Major Issues with ZFS + Dedup
I'm having more problems - this time, very, very serious ones, with ZFS and deduplication. Deduplication is basically making my iSCSI targets completely inaccessible to the clients trying to access them over COMSTAR. I have two commands right now that are completely hung:
1) zfs destroy pool/volume
2) zfs set dedup=off pool
The first command I started four hours ago, and it has barely removed 10G of the 50G that were allocated to that volume. It also seems to periodically cause the ZFS system to stop responding to any other I/O requests, which in turn causes major issues on my iSCSI clients. I cannot kill or pause the destroy command, and I've tried renicing it, to no avail. If anyone has any hints or suggestions on what I can do to overcome this issue, I'd very much appreciate that. I'm open to suggestions that will kill the destroy command, or will at least reprioritize it such that other I/O requests have precedence over this destroy command.
Thanks,
Nick