Date: Thu, 3 Sep 1998 01:12:26 +0000 (GMT) From: Terry Lambert <tlambert@primenet.com> To: cmascott@world.std.com (Carl Mascott) Cc: hackers@FreeBSD.ORG Subject: Re: Reading/writing /usr/ports is VERY slow Message-ID: <199809030112.SAA02792@usr07.primenet.com> In-Reply-To: <199809022252.SAA00872@europa.local> from "Carl Mascott" at Sep 2, 98 06:52:59 pm
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> However, > if a cg proximity criterion were added to the new-cg-chooser, > then the size of a cg would become a factor, although I don't > know how important a factor. Very important. It would result in FFS finally adding "support" for fragmenting the bejesus out of a disk drive. This would be a *very* bad thing. > Hopefully someone who knows the history of FFS development > will chime in at this point. It would be nice to know if > any other directory placement policies were ever tried and > rejected. The original "free reserve" values were set to 10% for a reason; it was a compromise between people who wanted to use every byte, and the actual 15% value required for a "perfect hash". In effect, when the FS picks a block (or, more correctly, a cluster), it is hashing the filespace onto the disk. Terry Lambert terry@lambert.org --- Any opinions in this posting are my own and not those of my present or previous employers. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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