ZFS & Bittorent -> Hang?
kometen at gmail.com
Fri Apr 18 18:03:20 UTC 2008
> OK. I've been able to reproduce the issue.
> - Stock shipped kernel and modules from RELENG 7.0
> loader.conf settings:
> - zfs prefetch enabled
> - zfs zil disabled
> - vm.kmem_size_max="1073741824"
> - vm.kmem_size="1073741824"
> AMD64 on Core 2 Duo w/ 4 GB RAM
> raidz across 4 disks, using root on zfs (also experienced this hang with zfs
> just on /usr)
> How To Reproduce
> - install transmission-daemon, run transmission-daemon (it will daemonize,
> automatically backgrounding)
> - grab a torrent, such as KNOPPIX (http://torrent.unix-ag.uni-kl.de/)
> - transmission-remote -a <torrentfile> (add the torrent)
> - transmission-remote -s all (start all the torrents)
> wait hours to a day or so with whatever you want logging things running and
> active since anything that hits disk after the hang will get hung as well
> I've just done this twice. It doesn't seem to happen with zil enabled and
> prefetch off.
> Expected Behavior
> No hang.
Thank you for spending time on this. I'm getting some jbod-storage in
a few weeks and will spend some time using various block-sizes and
share partitions across nfs. I'm somewhat confident that zfs on
FreeBSD will work fine but Solaris is (of course) also an option. This
will be approx. 7 TB to begin with and growing upwards to some two
What is the largest storage zfs on FreeBSD has been used on? I tried
it for some month on 8 TB.
When lenity and cruelty play for a kingdom,
the gentlest gamester is the soonest winner.
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