Date: Mon, 3 Apr 1995 10:49:04 -0500 (GMT-0500) From: "Serge A. Babkin" <babkin@hq.icb.chel.su> To: terry@cs.weber.edu (Terry Lambert) Cc: freebsd-hackers@FreeBSD.org Subject: Re: large filesystems/multiple disks Message-ID: <199504031549.KAA03988@hq.icb.chel.su> In-Reply-To: <9504010658.AA08921@cs.weber.edu> from "Terry Lambert" at Mar 31, 95 11:58:47 pm
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> The main problem is that there needs to be file system support for the > idea of additional disk space ...ie: one place where you can add > things on. > > This will work with IBM's JFS (obviously) or with a log structured > file system, but precious little else. UFS is particularly badly > suited to doing this. If you do what SPRITE does and shove all > the inodes in one area and all of the data blocks in another, you > can sort of do this for UFS. The alternative is to preallocate > a major large number of inodes in the first place (which is what I > did) or to backup, remkfs the file system after adding the storage, > and restore everything. HP has UFS (they name it HFS) on LVM. I'm not shure but I think that they use "cylinder group" as a quantum of space allocation. Serge Babkin ! (babkin@hq.icb.chel.su) ! Headquarter of Joint Stock Bank "Chelindbank" ! Chelyabinsk, Russia
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