From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263159AbTJPUSh (ORCPT ); Thu, 16 Oct 2003 16:18:37 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S263161AbTJPUSh (ORCPT ); Thu, 16 Oct 2003 16:18:37 -0400 Received: from parcelfarce.linux.theplanet.co.uk ([195.92.249.252]:31172 "EHLO www.linux.org.uk") by vger.kernel.org with ESMTP id S263159AbTJPUSf (ORCPT ); Thu, 16 Oct 2003 16:18:35 -0400 Message-ID: <3F8EFD0B.1010508@pobox.com> Date: Thu, 16 Oct 2003 16:18:19 -0400 From: Jeff Garzik User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.4) Gecko/20030703 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Robert Love CC: John Bradford , Larry McVoy , linux-kernel@vger.kernel.org, val@nmt.edu Subject: Re: Transparent compression in the FS References: <1066163449.4286.4.camel@Borogove> <20031015133305.GF24799@bitwizard.nl> <3F8D6417.8050409@pobox.com> <20031016162926.GF1663@velociraptor.random> <20031016172930.GA5653@work.bitmover.com> <200310161828.h9GISxlN001783@81-2-122-30.bradfords.org.uk> <1066329102.5398.43.camel@localhost> In-Reply-To: <1066329102.5398.43.camel@localhost> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Robert Love wrote: > On Thu, 2003-10-16 at 14:28, John Bradford wrote: > > >>Surely it's just common sense to say that you have to verify the whole >>block - any algorithm that can compress N values into >lossy by definition. A mathematical proof for that is easy. > > > That is the problem. > > But those pushing this approach argue that the chance of collision is > less than the chance of hardware errors, et cetera. Nod. And there are certainly ways to avoid hash collisions... Jeff