Date: Thu, 10 Mar 2005 12:45:04 -0400 (AST) From: "Marc G. Fournier" <scrappy@hub.org> To: Andy Hilker <ah@crypta.net> Cc: Denis Shaposhnikov <dsh@neva.vlink.ru> Subject: Re: the current status of nullfs, unionfs Message-ID: <20050310123852.F92893@ganymede.hub.org> In-Reply-To: <20050310160852.GB1718@mail.crypta.net> References: <200503091838.06322.mi%2Bmx@aldan.algebra.com> <20050310004919.GA34206@hub.freebsd.org> <87ll8vn32j.fsf@neva.vlink.ru> <20050310160852.GB1718@mail.crypta.net>
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On Thu, 10 Mar 2005, Andy Hilker wrote: > Hi, > > You (Denis Shaposhnikov) wrote: >>>>>>> "Kris" == Kris Kennaway <kris@freebsd.org> writes: >> >> Kris> nullfs seems to work fine, unionfs is very fragile and easily >> Kris> exploded. >> >> nullfs is absolutely useless for jail's because TOO slow. > > > What do you mean exactly, how do you benchmark this? That's okay, my experiences are that nullfs is too fragile and easily exploded ... unionfs itself, though, isn't *rock solid*, but considering the loads that I throw at it on a daily basis, its alot more solid then the man pages indicate ... One server I have running 80+ jails on, each with their own unionfs running on it, and the last crash was a result of: panic: ufs_direnter : compact2 uptimes on our servers, all of which use unionfs extensively: pluto# ruptime jupiter up 11+23:09, 0 users, load 0.65, 0.78, 1.06 mars up 12+01:06, 0 users, load 0.53, 0.50, 0.55 neptune up 1+21:42, 3 users, load 2.03, 3.16, 3.10 pluto up 12+00:54, 3 users, load 1.33, 1.12, 1.34 venus up 12+00:00, 0 users, load 2.99, 10.73, 15.76 venus/neptune each run >80 jails ... And the reason why the other 4 servers are only around 12 days right now is because we just moved the servers to a new rack ... All servers run 4-STABLE, some a bit older, but a couple are less then a month old ... ---- Marc G. Fournier Hub.Org Networking Services (http://www.hub.org) Email: scrappy@hub.org Yahoo!: yscrappy ICQ: 7615664
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