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Date:      Thu, 18 Oct 2001 16:16:15 -0700
From:      "Crist J. Clark" <cristjc@earthlink.net>
To:        "David W. Chapman Jr." <dwcjr@inethouston.net>
Cc:        "Chad R. Larson" <chad@DCFinc.com>, Rasputin <rasputin@submonkey.net>, Garance A Drosihn <drosih@rpi.edu>, Doug Poland <doug@polands.org>, stable@FreeBSD.ORG
Subject:   Re: dirpref gives massive performance boost
Message-ID:  <20011018161615.F300@blossom.cjclark.org>
In-Reply-To: <01c701c157fa$d8449ba0$fe0c4042@inethouston.net>; from dwcjr@inethouston.net on Thu, Oct 18, 2001 at 12:32:22PM -0500
References:  <20010928141246.A15515@xor.obsecurity.org> <20011002212002.4034283f.steveo@eircom.net> <20011002214353.A653@student.uu.se> <20011018083713.A20403@polands.org> <20011018144850.A1943@shikima.mine.nu> <20011018105736.A43973@leviathan.inethouston.net> <p05101005b7f4bb89498e@[128.113.24.47]> <01c101c157f9$87868da0$fe0c4042@inethouston.net> <20011018103048.B545@freeway.dcfinc.com> <01c701c157fa$d8449ba0$fe0c4042@inethouston.net>

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On Thu, Oct 18, 2001 at 12:32:22PM -0500, David W. Chapman Jr. wrote:
[snip]

> Well yes, but I would like to avoid all of this if it is already using
> dirpref.  I currently don't have enough drive space to fully backup my 24gig
> stripe set.

dirpref isn't a "new feature." It is a routine that always been
there. Recently, the code within dirpref was modified to build more
effiecient filesystems. If the new code is in your kernel, you are
using it. But this will not change how an existing set of files and
directories on a filesystem is laid out. It will affect how new
directories are added to the filesystem. People who do a newfs(8) are
just making sure that they are starting to build a filesystem
completely from scratch with the new algorithm. The newfs(8) does not
change an attributes of the filesystem.
-- 
Crist J. Clark                     |     cjclark@alum.mit.edu
                                   |     cjclark@jhu.edu
http://people.freebsd.org/~cjc/    |     cjc@freebsd.org

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