On Oct 27, 2:51pm, Julian Elischer wrote:
} Subject: Re: why FFS is THAT slower than EXT2 ?
}
}
} On Wed, 27 Oct 1999, Mike Smith wrote:
}
} > > in order to save space I gzip'ped output of my tests.
} > > ungzipping ports tarball on FreeBSD took 28 min
} > > on Linux --- about 2.5 times faster.
} >
} > This is something we already know, and it's not the sort of test that
} > you should ever headline as "why is FFS so much slower"?
}
} Kirk has said that it would be possible for the FFS to modify its
} behaviour if it notices this usage pattern.
The basic problem is that the directory layout policy that FFS uses
is very non-optimal in this case. This was discussed extensively
on freebsd-hackers last year, search the list archive for
Reading/writing /usr/ports VERY slow
Carl Mascott noticed nearly a 3x speedup when he untarred /usr/ports
on FFS filesystem that was generated with only one cylinder group.
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