From owner-freebsd-questions@FreeBSD.ORG Thu Mar 1 23:24:12 2007 Return-Path: X-Original-To: freebsd-questions@freebsd.org Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 5D18A16A408 for ; Thu, 1 Mar 2007 23:24:12 +0000 (UTC) (envelope-from freebsd-questions@m.gmane.org) Received: from ciao.gmane.org (main.gmane.org [80.91.229.2]) by mx1.freebsd.org (Postfix) with ESMTP id D9FC413C491 for ; Thu, 1 Mar 2007 23:24:11 +0000 (UTC) (envelope-from freebsd-questions@m.gmane.org) Received: from list by ciao.gmane.org with local (Exim 4.43) id 1HMuEM-0001vw-Pr for freebsd-questions@freebsd.org; Thu, 01 Mar 2007 23:58:35 +0100 Received: from 83-131-168-30.adsl.net.t-com.hr ([83.131.168.30]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Thu, 01 Mar 2007 23:58:34 +0100 Received: from ivoras by 83-131-168-30.adsl.net.t-com.hr with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Thu, 01 Mar 2007 23:58:34 +0100 X-Injected-Via-Gmane: http://gmane.org/ To: freebsd-questions@freebsd.org From: Ivan Voras Date: Thu, 01 Mar 2007 23:34:38 +0100 Lines: 57 Message-ID: References: <539c60b90703010849x33dd4bbbt8f6ca6aa0c8e83a0@mail.gmail.com> <20070301165055.638b0a06.wmoran@collaborativefusion.com> <20070301172157.8fc10842.wmoran@collaborativefusion.com> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="------------enig7A5DDCDAA27043FF5B0775C9" X-Complaints-To: usenet@sea.gmane.org X-Gmane-NNTP-Posting-Host: 83-131-168-30.adsl.net.t-com.hr User-Agent: Thunderbird 1.5.0.9 (Windows/20061207) In-Reply-To: <20070301172157.8fc10842.wmoran@collaborativefusion.com> X-Enigmail-Version: 0.94.1.2 Sender: news Subject: Re: defrag X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 01 Mar 2007 23:24:12 -0000 This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enig7A5DDCDAA27043FF5B0775C9 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Bill Moran wrote: > In response to Ivan Voras : >> I believe that a "fragmented file" in common usage refers to a file >> which is not stored continuously on the drive - i.e. it occupies more >> than one continuous region. How is UFS fragmentation different than >> fragmentation on other kinds of file systems? >=20 > That common usage refers to Windows filesystems. >=20 > In unix filesystems, fragmentation refers to the number of blocks that = have > been broken down in to fragments to either hold files smaller than a bl= ock, > or (as you mentioned) use the space at the end of a file that doesn't f= it > exactly in a block. Ok, so the difference is in the name, not in the semantics :) Unfortunately, all the world is Windows now and that's why I try to use "block fragments" instead of just "fragments" to try avoid confusion. > But this also makes it _easy_ for the filesystem to avoid causing the t= ype > of fragmentation that _does_ degrade performance. For example, when th= e > first block is on track 10, then the next block is on track 20, then we= 're > back to track 10 again, then over to track 35 ... etc, etc >=20 > Keep in mind, that in the previous 3 paragraphs, I was using the "Windo= ws" > definition of "fragmentation." Agreed. --------------enig7A5DDCDAA27043FF5B0775C9 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.4 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFF51T+ldnAQVacBcgRApvpAKDuE7pcQlIhWSXdtkfIuEJQQLSlbgCfc8yo pgUEKgngalRlVKRTOyU+EEM= =PyyF -----END PGP SIGNATURE----- --------------enig7A5DDCDAA27043FF5B0775C9--