Date: Sun, 6 Jan 2008 21:00:35 +0100 From: "Claus Guttesen" <kometen@gmail.com> To: "Ivan Voras" <ivoras@freebsd.org> Cc: freebsd-current@freebsd.org Subject: Re: When will ZFS become stable? Message-ID: <b41c75520801061200i391a6a24o4d45bd35251133d1@mail.gmail.com> In-Reply-To: <flr3iq$of7$1@ger.gmane.org> References: <fll63b$j1c$1@ger.gmane.org> <20080106141157.I105@fledge.watson.org> <flr0np$euj$2@ger.gmane.org> <47810DE3.3050106@FreeBSD.org> <flr3iq$of7$1@ger.gmane.org>
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> >> Last I heard, rsync didn't crash Solaris on ZFS :) > > > > [Citation needed] > > I can't provide citation about a thing that doesn't happen - you don't > hear things like "oh and yesterday I ran rsync on my Solaris with ZFS > and *it didn't crash*!" often. > > But, with some grains of salt taken, consider this Google results: > > * searching for "rsync crash solaris zfs": 790 results, most of them > obviously irrelevant > * searching for "rsync crash freebsd zfs": 10,800 results; a small > number of the results is from this thread, some are duplicates, but it's > a large number in any case. > > I feel that the number of Solaris+ZFS installations worldwide is larger > than that of FreeBSD+ZFS and they've had ZFS longer. I used zfs on FreeBSD current amd64 around summer 2006 as a samba-server for internal use on a dual xeon (first generation 64-bit, somewhat slow and hot) with 4 GB ram and two qlogic hba's attached to approx. 8 TB of storage. I did not once experience any kernel panic or other unplanned stop. But I whenever I manually mounted a smbfs-share the terminal would not return to the command line. I upgraded in october 2007 and the smbfs-mount returned to the command line and I thought I was happy. Until I started to get the kmem_map too small kernel-panics when doing much I/O (syncing 40 GB of small files). I tuned the values as indicated in the zfs tuning guide and rebooted and increased the values as the kernel panics persisted. When I increased the values even more I ended up with a kernel which refused to boot, boy I was almost getting a panic myself :-) Applying Pawel's patch did make the server survive two or three 40 GB rsyncing so the patch did help. But we were approching xmas season which is a very critical time for us so I migrated to solaris 10. The solaris server has had no downtime but to conclude that solaris is more stable in my situation is premature. -- regards Claus When lenity and cruelty play for a kingdom, the gentlest gamester is the soonest winner. Shakespeare
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