Date: Wed, 14 Sep 2005 21:04:55 +0200 From: Wilko Bulte <wb@freebie.xs4all.nl> To: Robert Watson <rwatson@FreeBSD.ORG> Cc: Alexey Dokuchaev <danfe@FreeBSD.ORG>, src-committers@FreeBSD.ORG, Brooks Davis <brooks@one-eyed-alien.net>, cvs-src@FreeBSD.ORG, Garance A Drosehn <gad@FreeBSD.ORG>, Marcel Moolenaar <marcel@xcllnt.net>, cvs-all@FreeBSD.ORG Subject: Re: cvs commit: src/sys/conf kern.post.mk Message-ID: <20050914190455.GA71466@freebie.xs4all.nl> In-Reply-To: <20050914183720.P57836@fledge.watson.org> References: <200509110310.36423@harrymail> <43255152.3000609@freebsd.org> <20050912165518.GA94181@dragon.NUXI.org> <20050913125820.GA10663@FreeBSD.org> <F74CCD5E-AD4C-4343-9626-5F6460C4D6C6@xcllnt.net> <p06230916bf4d11bb5363@[128.113.24.47]> <20050914100957.L33820@fledge.watson.org> <20050914155307.GA32734@odin.ac.hmc.edu> <0D07312F-7DDB-40E4-A63A-3E00969F5A4C@xcllnt.net> <20050914183720.P57836@fledge.watson.org>
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On Wed, Sep 14, 2005 at 06:39:40PM +0100, Robert Watson wrote.. > > On Wed, 14 Sep 2005, Marcel Moolenaar wrote: > > >>>We probably ought to move this discussion to another list, but -- I > >>>remember two very specific occasions where I first realized how > >>>important an isolated /var is: > >>> > >>>(1) In about 1995, when I first started using ppp, I discovered the > >>> hard way that the default logging level was set a bit high, and > >>> filled > >>> the entire hard disk with log records in a couple of days. > >*snip* > >> > >>I've also hit cases where the log come in so fast that you can fill a > >>1GB /var fast enough that newsyslog never has a chance to compress the > >>log. > >*snip* > > > >Just so that people realize: what is being described is not an argument > >for having /var be a separate partition, but really for having /var/log > >be a separate partition. It's just that the granularity of our thinking > >is highly influenced by our legacy, even to the extend of it becoming an > >intellectual jail. > > > >I think it's much easier to size a /var/log partition effectively than > >it is to size /, /usr and /var effectively... > > > >Just some food for thought, > > Yeah, I specifically mentioned /var/mqueue and /var/mail as examples of > other components. > > I agree though that what current and past state of the art has supported > is narrowing our thinking. If we were using a system like AFS (listen to > the groans from the crowd who hates it when I harp on AFS!), we would > simply allocate different volumes for the directories using the same > back-end storage pool, and be able to administratively change the volume > quotas at low overhead. The traditional BSD/UNIX quota model and/or file > system model has no way to express this sort of notion, and it's a very > useful notion. /me goes out and dynamically expands his RAID LUN on the FC array ;) -- Wilko Bulte wilko@FreeBSD.org
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