From owner-freebsd-stable  Sun Sep 30 18:53:20 2001
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Date: Mon, 01 Oct 2001 02:52:08 +0100
From: ian j hart <ianjhart@ntlworld.com>
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To: Patrick Greenwell <patrick@stealthgeeks.net>
Cc: Dennis Berger <Dennis.Berger@nipsi.de>,
	Mike Harding <mvh@ix.netcom.com>, stable@FreeBSD.ORG
Subject: Re: dirpref gives massive performance boost
References: <Pine.BSF.4.33.0109301624340.15097-100000@rockstar.stealthgeeks.net>
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Patrick Greenwell wrote:
> 
> On Mon, 1 Oct 2001, Dennis Berger wrote:
> 
> > I tested FreeBSD-4.4 stable checked out today with  a new created filesystem and a old
> > existing one. The results are on the old filesystem with just tar and untaring ports, I
> > can report afaik no speed up. On the new created filesystem the results are very
> > impressive about 6 to 10 times faster.
> 
> I'd love to hear any reports from folks running the dirpref code on any
> sort of RAID'd devices (vinum, DPT, Adaptec, etc.) or comments from those
> in the know as to whether such marked speedup can be expected.
> 
> TIA
> 
> /\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\
>                                Patrick Greenwell
>                  "There should be warning labels for politicians."
>                             --  Derek Smalls
> \/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/
> 
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I just did rm -r /usr/ports to test

existing tree: 10 or 11m.
newly extracted tree: 1.5m

This is without newfs, on a clean tree.

System is k6II500, 256Mb, VIA ATA33, 4xUDMA66 drives RAID10, softupdates
no special tuning. File system is 30% full (27Gb).

If you are comparing times you should be aware that I refuse all
language specific ports. The existing tree was HEAD and I extracted
RELEASE_4_4_0, but I can't see that making a factor of 6 difference.

-- 
ian j hart

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