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From: Terry Lambert <terry@lambert.org>
Message-Id: <199511210027.RAA02573@phaeton.artisoft.com>
Subject: Re: Disk De-Fragmenter...?
To: smf@pdm.kla.com (Scott MacFiggen)
Date: Mon, 20 Nov 1995 17:27:38 -0700 (MST)
Cc: questions@freefall.freebsd.org
In-Reply-To: <9511200925.ZM8366@buford.wring.pdm> from "Scott MacFiggen" at Nov 20, 95 09:25:30 am
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> IRIX comes with a defragmenter (file system reorganizer): /usr/etc/fsr
> 
> DESCRIPTION
>      fsr improves the organization of mounted file systems.  The
>      reorganization algorithm operates on one file at a time, compacting or
>      otherwise improving the layout of the file extents (contiguous blocks of
>      file data) while simultaneously compacting the file system free space.
> 
> Is it just the Berkeley fast filesystem that doesn't need a defragger or
> all Unix filesystems in general?

UNIX file systems which are not extent based.

Clearly, since "fsr" operates on file extents, it assumes an extent-based
FS exists.  UFS is not extent based.


					Terry Lambert
					terry@lambert.org
---
Any opinions in this posting are my own and not those of my present
or previous employers.