Date: Wed, 21 Nov 2001 15:03:28 -0600 From: Mike Meyer <mwm@mired.org> To: "Graham Lillico" <graham_lillico@hotmail.com> Cc: questions@freebsd.org Subject: Re: Filesystem Sizes Message-ID: <15356.5792.940318.744392@guru.mired.org> In-Reply-To: <27084310@toto.iv>
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Graham Lillico <graham_lillico@hotmail.com> types:
> So what i'm now thinking is to have the 80Gb filesystem (2x40Gb Hardware
> raid) mounted as /usr on the fileserver and then nfs export /usr/ports,
> /usr/src, and /usr/obj to the other FreeBSD systems, then on the 20Gb disc
> that contains the system have about 10Gb exported as /usr/home.
>
> Does this sounds like a good plan? Or am I letting myself in for some
> problems?
Well, it seems like an aweful lot of space for /usr. There are three
potential problems: 1) All three directories will have to be exported
with the same permissions; 2) If you wind up running different
platforms, you'll have to build ports/system for them differently; 3)
Installing a port on one system will make the other systems thing it's
not installed.
Personally, I'd do it this way:
1 drive: /
1 drive: /share
1 drive: /home
20GB should be enough space for any of those, unless you're planning
on doing something very strange. If you're using IDE, / and /share
need to be on different controllers. Putting /home on a third
controller won't hurt.
/share is exported r/w to the world. /usr/obj is symlinked to
/share/obj. /usr/src and /usr/ports are on /, exported r/o.
This lets you make buildworld on the system with local disk, and make
installworld on other systems that mount /usr/src and /shar and have
the /usr/obj symlink. Putting /usr/obj and /usr/src on different
disks/controllers improves buildworld performance more than putting
them on vinum. You can do the same for kernels if you set
KERNCONF=BUILDKERNEL OTHERSYSTEM THIRDSYSTEM
in /etc/make.conf. All the kernels will be built by make buildkernel,
and the first one on the line will be installed by make installkernel.
In /etc/make.conf, you have DISTDIR=/share/distfiles,
WRKDIRPEFIX=/usr/ports-build, and PACKAGES=/share/packages.
This lets systems share distfiles that have been downloaded and the
/usr/ports tree, and avoids the problems of conflicting builds. If you
want to distribute a port to multiple system, do "make package" after
you've installed it, and the other systems will get the the package
from /share/packages.
One of these days, I have to write all this stuff up formally.
<mike
--
Mike Meyer <mwm@mired.org> http://www.mired.org/home/mwm/
Q: How do you make the gods laugh? A: Tell them your plans.
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