Date: Fri, 19 Jan 2007 11:22:38 -0600 From: Eric Anderson <anderson@centtech.com> To: Kris Kennaway <kris@obsecurity.org> Cc: "W. Josephson" <freebsd@morphisms.net>, freebsd-current@freebsd.org Subject: Re: building a new fileserver Message-ID: <45B0FE5E.7090201@centtech.com> In-Reply-To: <20070119032814.GA83278@xor.obsecurity.org> References: <20070119025156.GB77180@mero.morphisms.net> <20070119032814.GA83278@xor.obsecurity.org>
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On 01/18/07 21:28, Kris Kennaway wrote: > On Thu, Jan 18, 2007 at 09:51:56PM -0500, W. Josephson wrote: >> I'd like to solicit people's opinions about configuring >> CURRENT for a new fileserver that we'll be using internally. >> I have only recently had hardware available for running anything >> other than 6-STABLE so: >> >> 1. We'd like to use the 16-port 3Ware 9650SE-16. >> Does anyone here have experience with this card in >> RAID-6 mode under FreeBSD? >> >> 2. Any one have advice for setting up UFS+gjournal? >> I've been using FFS+SU for some time on a number of machines >> with filesystems up to about 1TB, but I'm not looking forward >> to fsck, even background fsck, on multiple 10TB filesystems. >> Does anyone here have experience with UFS+gjournal on large >> filesystems? Are there any gotchas to be aware of when >> configuring? Can someone describe briefly what guarantees >> UFS+gjournal makes? > > One gotcha with gjournal is that there is apparently still at least > one pretty obscure data corruption bug lurking. I see this when doing > concurrent package builds on a 12 cpu system with a single gjournal > data store, although I haven't run this configuration for a few > months. > > Kris As a data point, I've been using gjournal with two 10Tb file systems (same host) for some time now, and it has been doing the job quite well. I don't have nearly the number of CPU's as you, and I dedicate a journal for each fs. Eric -- ------------------------------------------------------------------------ Eric Anderson Sr. Systems Administrator Centaur Technology An undefined problem has an infinite number of solutions. ------------------------------------------------------------------------
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