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Path: sserve!manuel!munnari.oz.au!network.ucsd.edu!swrinde!cs.utexas.edu!uunet!kithrup!sef From: sef@kithrup.COM (Sean Eric Fagan) Newsgroups: comp.unix.bsd Subject: Re: Take out fs cache! Message-ID: <1992Jul17.101759.1119@kithrup.COM> Date: 17 Jul 92 10:17:59 GMT References: <ndadocs@sgi.sgi.com> Organization: Kithrup Enterprises, Ltd. Lines: 20 In article <ndadocs@sgi.sgi.com> rpw3@rigden.wpd.sgi.com (Rob Warnock) writes: >Of course, you'll kill write performance for things that change a lot, >like directories when you're unpacking a "tar" or "cpio" archive, but >the filesystem will be "safer". Directory writes occur synchronously. Someone (M. Ohta, I think) presented a paper at UseNIX a couple of years ago in which he created a /tmp filesystem by disabling synchronous writes for directores, and thus got a speedup. He did not recommend doing this for a filesystem you did not mind losing after a boot 8-). Because of that, doing a sync() more often won't affect creating, renaming, or unlinking files/directories, except that everything else will be slow as well. -- Sean Eric Fagan | "My psychiatrist says I have a messiah sef@kithrup.COM | complex. But I forgive him." -----------------+ -- Jim Carrey Any opinions expressed are my own, and generally unpopular with others.