Date: Thu, 30 Jan 2003 17:09:19 -0800 (PST) From: "Bruce R. Montague" <brucem@cruzio.com> To: freebsd-hackers@freebsd.org Subject: Re: Random disk cache expiry Message-ID: <200301310109.h0V19Jo00850@dsl3-63-249-66-35.cruzio.com>
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Hi, re: > If a file's access history were stored as a "hint" > associated with the file, then it would > be possible to make better up-front decisions about > how to allocate cache space. I believe at one time this was a hot area, and now maybe it is back. I vaguely recall a recent PhD in this area, you might want to contact him and get some up to date pointers (I think Tom Kroger spent some time at CMU looking at a lot of file access traces in this regard). I believe Tom modified a Linux filesystem to do just this and did a fair amount of benchmarking (which, of course, proved it (or at least his PhD ;) was useful)! In any case you might get some interesting starting refs if you are interested in this area... http://www.cse.ucsc.edu/~tmk/ http://csl.cse.ucsc.edu/prediction.shtml http://csl.cse.ucsc.edu/acme.shtml - bruce To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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