From owner-freebsd-hackers@FreeBSD.ORG Wed Jun 8 17:17:10 2005 Return-Path: X-Original-To: hackers@freebsd.org Delivered-To: freebsd-hackers@FreeBSD.ORG Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id A48EE16A41C for ; Wed, 8 Jun 2005 17:17:10 +0000 (GMT) (envelope-from brucem@mail.cruzio.com) Received: from cruzio.com (dsl3-63-249-85-132.cruzio.com [63.249.85.132]) by mx1.FreeBSD.org (Postfix) with ESMTP id 5F83743D48 for ; Wed, 8 Jun 2005 17:17:10 +0000 (GMT) (envelope-from brucem@mail.cruzio.com) Received: from mail.cruzio.com (localhost [127.0.0.1]) by cruzio.com (8.12.10/8.12.10) with ESMTP id j58GJL2P000349; Wed, 8 Jun 2005 09:19:21 -0700 (PDT) (envelope-from brucem@mail.cruzio.com) Received: (from brucem@localhost) by mail.cruzio.com (8.12.10/8.12.10/Submit) id j58GJIob000348; Wed, 8 Jun 2005 09:19:18 -0700 (PDT) (envelope-from brucem) Date: Wed, 8 Jun 2005 09:19:18 -0700 (PDT) From: "Bruce R. Montague" Message-Id: <200506081619.j58GJIob000348@mail.cruzio.com> To: hackers@freebsd.org Cc: scottl@samsco.org, ivoras@fer.hr Subject: Re: Google SoC idea X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 08 Jun 2005 17:17:10 -0000 Scott Long wrote: >Again, I'm not exactly sure how a generic mechanism can handle the >distinction of data vs. metadata vs. journal data. Also, what you Ivan Voras wrote: >I don't care about the distinction at this level - all data is treated >equal. Scott Long wrote: >But for journalling to work, you must care about the distinction. Ivan, some recent PhD dissertations probably discuss some of the dragons lurking in this area. For instance, see the "thesis research" discussion and papers in: http://www.cs.wisc.edu/~muthian/ His paper "Life or Death at Block-Level" might be of interest... - bruce