Date: Wed, 9 Jun 2004 21:44:39 +0200 From: Stijn Hoop <stijn@win.tue.nl> To: Scott <freebsdq@sonservers.com> Cc: freebsd-questions@freebsd.org Subject: Re: Improper shutdown of system / Fragmentation Problems / Boot Message-ID: <20040609194439.GD11712@pcwin002.win.tue.nl> In-Reply-To: <200469142140.786530@IBM-R40> References: <200406091845.i59Ij8Y12090@clunix.cl.msu.edu> <200469142140.786530@IBM-R40>
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[-- Attachment #1 --] On Wed, Jun 09, 2004 at 02:21:40PM -0500, Scott wrote: > As a newbie to FreeBSD, I may be way off base, but it seems > very logical to me that the size of your drive or partition > would make a difference on at what percentage full one would > start to notice problems. > > In terms of megs/gigs 80% of 120 gigs still has a lot of > work space left. 80% of 4 gigs is not much. I would think > with a larger drive/partition, one could run at a higher > percentage before trouble started. > > It makes sense to me anyway :) That's what one would like, but UFS doesn't work that way. It's allocation algorithm assumes 10% of the disk is free -- regardless of actual size. Or so I've been told (multiple times). IMHO this is a bit ridiculous -- I mean, given 1 TB of space (nearly feasible for a home server right now), why would an FS allocator need 10% of that if the files on the volume are averaging 10 MB? But then again, and this is worth noting -- I'm certainly nowhere near as clueful as others on how to design a stable & fast file system. Seeing as UFS1 is still in use, and has been for the last 20 years (think about it!), I think maybe the tradeoff might make sense to an expert... BTW, note that you really need to consider the perfomance drop for yourself -- like others said, if the files on the volume change infrequently, performance matters little, and space more so. --Stijn -- This sentence contradicts itself -- no actually it doesn't. -- Hofstadter [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.4 (FreeBSD) iD8DBQFAx2inY3r/tLQmfWcRAgG5AJ4/v0XKg/OFj+8VtWc1TEy1zKAtLgCgpa7n 24QCEWJQpf2pU7Gqlpzxum4= =+qsU -----END PGP SIGNATURE-----help
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