Date: Fri, 18 Apr 2008 20:03:19 +0200 From: "Claus Guttesen" <kometen@gmail.com> To: jbsnyder <jbsnyder@gmail.com> Cc: freebsd-stable@freebsd.org Subject: Re: ZFS & Bittorent -> Hang? Message-ID: <b41c75520804181103p1719810dsdf22a7c151e9f30e@mail.gmail.com> In-Reply-To: <16763410.post@talk.nabble.com> References: <16447331.post@talk.nabble.com> <ft2fsj$7i7$1@ger.gmane.org> <16491496.post@talk.nabble.com> <b41c75520804150244p1f7c9693w180cb3a0d4416e4c@mail.gmail.com> <33644d3c0804151005r17095cb1n33117a8e4d8cc09b@mail.gmail.com> <16763410.post@talk.nabble.com>
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> OK. I've been able to reproduce the issue. > > Conditions: > - 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 digit TB's. What is the largest storage zfs on FreeBSD has been used on? I tried it for some month on 8 TB. -- regards Claus When lenity and cruelty play for a kingdom, the gentlest gamester is the soonest winner. Shakespeare
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