From owner-freebsd-fs@FreeBSD.ORG Fri Jun 10 16:21:00 2005 Return-Path: X-Original-To: freebsd-fs@freebsd.org Delivered-To: freebsd-fs@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id F155816A41C for ; Fri, 10 Jun 2005 16:21:00 +0000 (GMT) (envelope-from anderson@centtech.com) Received: from mh2.centtech.com (moat3.centtech.com [207.200.51.50]) by mx1.FreeBSD.org (Postfix) with ESMTP id A0F1F43D1F for ; Fri, 10 Jun 2005 16:21:00 +0000 (GMT) (envelope-from anderson@centtech.com) Received: from [10.177.171.220] (neutrino.centtech.com [10.177.171.220]) by mh2.centtech.com (8.13.1/8.13.1) with ESMTP id j5AGKw9K028954; Fri, 10 Jun 2005 11:20:58 -0500 (CDT) (envelope-from anderson@centtech.com) Message-ID: <42A9BDD0.7010702@centtech.com> Date: Fri, 10 Jun 2005 11:20:32 -0500 From: Eric Anderson User-Agent: Mozilla/5.0 (X11; U; FreeBSD i386; en-US; rv:1.7.8) Gecko/20050603 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Allan Fields References: <42A8F780.6000408@centtech.com> <20050610160752.GA56346@afields.ca> In-Reply-To: <20050610160752.GA56346@afields.ca> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Cc: freebsd-fs@freebsd.org Subject: Re: Interesting book on filesystems X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 10 Jun 2005 16:21:01 -0000 Allan Fields wrote: > On Thu, Jun 09, 2005 at 09:14:24PM -0500, Eric Anderson wrote: > >>I'm sure it's been mentioned before, but just in case it hasn't: >> >>http://www.nobius.org/~dbg/ >> >>Has a pdf of a "Practical File System Design..." book and a "File System >> Construction Kit". I'm going to download and play with the kit - not >>sure if will work without too much trouble on FreeBSD. >> >>Eric > > > I downloaded and read this one as well. For a while I was looking > in the stores, but it went out of fashion. Thanks to the author > for putting it online. > > The idea behind BFS's extended attributes in the inode is different > than the UFS 2 implementation, are you interested in seeing any > further enhancements to file systems under BSD?. I mentioned on the -current list that I'd *love* to have a clustered filesystem under FreeBSD. I think it's the future of filesystems, much as journaling is becoming prevalent today. > One idea floated was adding journalling and/or transactions to UFS. > Then there is also the issue of cache coherency. Scott Long is currently working on adding journaling to UFS. I think he's making good progress. > Another, is to start adding semantic enhancements to the file > system. In talking with Marshall Kirk McKusick, the prefered > approach from a BSD perspective might be incremental addition > of features in a way that will render UFS workable and w/o > the likelihood of data loss/corruption much like the dirhash > implementation. Seems like filesystem innovation is not so popular these days, but I think with a little brainstorming some creative individuals could come up with some very powerful and unique solutions to problems we are just used to dealing with.. Eric -- ------------------------------------------------------------------------ Eric Anderson Sr. Systems Administrator Centaur Technology A lost ounce of gold may be found, a lost moment of time never. ------------------------------------------------------------------------