From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Fri, 4 May 2001 21:11:00 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Fri, 4 May 2001 21:10:50 -0400 Received: from neon-gw.transmeta.com ([209.10.217.66]:6162 "EHLO neon-gw.transmeta.com") by vger.kernel.org with ESMTP id ; Fri, 4 May 2001 21:10:37 -0400 To: linux-kernel@vger.kernel.org From: "H. Peter Anvin" Subject: Compressed iso9660 filesystem Date: 4 May 2001 18:10:19 -0700 Organization: Transmeta Corporation, Santa Clara CA Message-ID: <9cvjtr$jku$1@cesium.transmeta.com> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT Disclaimer: Not speaking for Transmeta in any way, shape, or form. Copyright: Copyright 2001 H. Peter Anvin - All Rights Reserved Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Okay, I think I now feel comfortable enough that I think I can unleash this on the world... I have made an extension to iso9660/RockRidge to allow for transparent uncompression of block-compressed files. Because the files are block-compressed, random access is fast; it uses a 32K blocksize which gets pretty good compression ratios (I got 2:1 overall compression on my SuperRescue CD; that includes a fair number of incompressible files.) The patches are available as: ftp://ftp.kernel.org/pub/linux/kernel/people/hpa/filemap-2.4.4-1.diff.gz ftp://ftp.kernel.org/pub/linux/kernel/people/hpa/zisofs-2.4.5-pre1-5.diff.gz (Both are needed.) Additionally, the user-space utilities (a program to compress and uncompress file trees, and a patch to mkisofs to generate the new RockRidge records for compressed files) are available at: ftp://ftp.kernel.org/pub/linux/kernel/people/hpa/zisofs/ If you test this out, please let me know; I'd like to know if anyone actually cares about this... also, I would like to gauge if I have messed up stability anywhere. -hpa -- at work, in private! "Unix gives you enough rope to shoot yourself in the foot." http://www.zytor.com/~hpa/puzzle.txt