*BSD News Article 80031


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From: j@uriah.heep.sax.de (J Wunsch)
Newsgroups: comp.unix.bsd.freebsd.misc
Subject: Re: async
Date: 5 Oct 1996 19:49:22 GMT
Organization: Private BSD site, Dresden
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References: <3252f11b.1314289@news.hol.gr> <32537E48.500F9F30@freebsd.org>
  <Dyr8MF.9Gp@cogsci.ed.ac.uk>
Reply-To: joerg_wunsch@uriah.heep.sax.de (Joerg Wunsch)
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richard@cogsci.ed.ac.uk (Richard Tobin) wrote:

> Jordan, what are the practical situations where you find it makes a
> useful difference?  Are they ones (like compiling) where simply
> ensuring that temporary files are on a mfs is almost as good?

I'm not Jordan, anyway, it (naturally) has the best effect in
situations when you're going to rm -rf something, or to extract
tarballs with zillions of small files or symlinks.  As for Jordan,
remember that he's ``Mr. Sys Install'' in FreeBSD, thus i believe this
situation arises more often to him than to the average user.

Also remember the `-u' flag to mount (``update mount'').  You can
easily do:

	mount -u -o async /usr
	rm -rf /usr/obj
	mount -u -o noasync /usr

...if you wanna accelerate some particular i-node intensive operation,
without risking too much as the default state.  I'm using this method
quite often.

-- 
cheers, J"org

joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ -- NIC: JW11-RIPE
Never trust an operating system you don't have sources for. ;-)