Date: Sun, 6 Jan 2008 14:46:27 +0100 From: Maciej Suszko <maciej@suszko.eu> To: freebsd-current@freebsd.org Subject: Re: When will ZFS become stable? Message-ID: <20080106144627.a91a62c1.maciej@suszko.eu> In-Reply-To: <4780D289.7020509@FreeBSD.org> References: <fll63b$j1c$1@ger.gmane.org> <20080104163352.GA42835@lor.one-eyed-alien.net> <9bbcef730801040958t36e48c9fjd0fbfabd49b08b97@mail.gmail.com> <200801061051.26817.peter.schuller@infidyne.com> <9bbcef730801060458k4bc9f2d6uc3f097d70e087b68@mail.gmail.com> <4780D289.7020509@FreeBSD.org>
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Kris Kennaway wrote: > Ivan Voras wrote: > > On 06/01/2008, Peter Schuller <peter.schuller@infidyne.com> wrote: > >>> This number is not so large. It seems to be easily crashed by > >>> rsync, for example (speaking from my own experience, and also > >>> some of my colleagues). > >> I can definitely say this is not *generally* true, as I do a lot of > >> rsyncing/rdiff-backup:ing and similar stuff (with many files / > >> large files) on ZFS without any stability issues. Problems for me > >> have been limited to 32bit and the memory exhaustion issue rather > >> than "hard" issues. > > > > It's not generally true since kmem problems with rsync are often > > hard to repeat - I have them on one machine, but not on another, > > similar machine. This nonrepeatability is also a part of the > > problem. > > > >> But perhaps that's all you are referring to. > > > > Mostly. I did have a ZFS crash with rsync that wasn't kmem related, > > but only once. > > kmem problems are just tuning. They are not indicative of stability > problems in ZFS. Please report any further non-kmem panics you > experience. I agree that ZFS is pretty stable itself. I use 32bit machine with 2gigs od RAM and all hang cases are kmem related, but the fact is that I haven't found any way of tuning to stop it crashing. When I do some rsyncing, especially beetwen different pools - it hangs or reboots - mostly on bigger files (i.e. rsyncing ports tree with distfiles). At the moment I patched the kernel with vm_kern.c.2.patch and it just stopped crashing, but from time to time the machine looks like beeing freezed for a second or two, after that it works normally. Have you got any similar experience? -- regards, Maciej Suszko.
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