Date: Thu, 15 Mar 2001 17:12:07 +0100 From: morten@hotpost.dk To: freebsd-questions@freebsd.org Subject: Re: Mounting MFS? Message-ID: <20010315171207.A76291@hotpost.dk> In-Reply-To: <01031420414701.00912@Nero>; from cublai@earthlink.net on Wed, Mar 14, 2001 at 08:24:50PM -0700 References: <01031420414701.00912@Nero>
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The cacophony of voices in my head
Inform me that z thompson said:
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> Could someone shed some light on what the advantages are of mounting an
> MFS RAM disk on /tmp? I was thumbing through the kernel chapter in "The
> Complete FreeBSD" where Lehey talks about mounting your swap partition as a MFS
> on /tmp. Specifically he says that this will be "useful if you have a lot of
> swap space that you want to take advantage of[...]" What I don't understand is
> how or why your swap space will be more useful mounted as a mfs as opposed to
> not?
It's faster than normal ufs, and you don't care if you loose all data in
a crash on that partition.
I have no numbers on FreeBSD, but a make build on OpenBSD (same as make
world on FreeBSD) is about 10% faster with /tmp as mfs and not ffs (ufs
in FreeBSD).
I use this line in /etc/fstab:
/dev/ad2s1b /tmp mfs rw,async,nodev,nosuid,-s=108000 0 0
It seems make's in /usr/src needs to run executables out of /tmp, so
don't mount it noexec as I did first.
It's nice, I've experienced no drawbacks from it in neither Free nor
OpenBSD, but I've only run FreeBSD for about a week now ...
Hope that answered your question
Morten
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