From owner-svn-src-head@FreeBSD.ORG Wed Apr 2 16:04:50 2014 Return-Path: Delivered-To: svn-src-head@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 44D88FFA; Wed, 2 Apr 2014 16:04:50 +0000 (UTC) Received: from mail.lifanov.com (mail.lifanov.com [206.125.175.12]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 226C2347; Wed, 2 Apr 2014 16:04:49 +0000 (UTC) Received: by mail.lifanov.com (Postfix, from userid 58) id 288A31AF4BF; Wed, 2 Apr 2014 11:55:55 -0400 (EDT) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on mail.lifanov.com X-Spam-Level: X-Spam-Status: No, score=-1.0 required=5.0 tests=ALL_TRUSTED,SHORTCIRCUIT shortcircuit=ham autolearn=disabled version=3.4.0 Received: from [10.1.3.5] (cnet520-windstream.mcclatchyinteractive.com [166.108.16.2]) (using TLSv1 with cipher ECDHE-RSA-AES128-SHA (128/128 bits)) (No client certificate requested) by mail.lifanov.com (Postfix) with ESMTPSA id BD9AC1A5943; Wed, 2 Apr 2014 11:55:37 -0400 (EDT) Message-ID: <533C32F5.9050809@mail.lifanov.com> Date: Wed, 02 Apr 2014 11:55:33 -0400 From: Nikolai Lifanov User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:24.0) Gecko/20100101 Thunderbird/24.4.0 MIME-Version: 1.0 To: Glen Barber , Brooks Davis Subject: Re: svn commit: r264027 - in head: release share/man/man7 References: <201404012241.s31MfRW6020684@svn.freebsd.org> <20140402154022.GA70867@lor.one-eyed-alien.net> <20140402155134.GG14379@glenbarber.us> In-Reply-To: <20140402155134.GG14379@glenbarber.us> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: svn-src-head@freebsd.org, svn-src-all@freebsd.org, src-committers@freebsd.org X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.17 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 02 Apr 2014 16:04:50 -0000 On 04/02/14 11:51, Glen Barber wrote: > On Wed, Apr 02, 2014 at 10:40:22AM -0500, Brooks Davis wrote: >> On Tue, Apr 01, 2014 at 10:41:27PM +0000, Glen Barber wrote: >>> Author: gjb >>> Date: Tue Apr 1 22:41:26 2014 >>> New Revision: 264027 >>> URL: http://svnweb.freebsd.org/changeset/base/264027 >>> >>> Log: >>> Add a new release build variable, WITH_COMPRESSED_IMAGES. >>> >>> When set to a non-empty value, the installation medium is >>> compressed with gzip(1) as part of the 'install' target in >>> the release/ directory. >>> >>> With gzip(1) compression, downloadable image are reduced in >>> size quite significantly. Build test against head@263927 >>> shows the following: >>> >>> bootonly.iso: 64% smaller >>> disc1.iso: 44% smaller >>> memstick.img: 47% smaller >>> mini-memstick.img: 65% smaller >>> dvd1.iso: untested >>> >>> This option is off by default, I would eventually like to >>> turn it on by default, and remove the '-k' flag to gzip(1) >>> so only compressed images are published on FTP. >> >> I'd recommend testing xz compression as well. With UFS images of a full >> world the savings vs gzip are significant (more than 30% IIRC, but it's >> need more than a year since I checked so I'm a bit unsure of the exact >> numbers). >> > > delphij also brought this up. > > I have concerns with xz(1), since there was mention in IRC that Windows > users may have problems decompressing xz-compressed images. So, gzip(1) > is used because it seems to be the more commonly-supported archive > mechanisms. > > The benefit of xz(1) over gzip(1) was only 50M-ish. > > -rw-r--r-- 1 root wheel 601M Mar 28 20:18 disc1.iso > -rw-r--r-- 1 root wheel 381M Mar 28 20:18 disc1.iso.bz2 > -rw-r--r-- 1 root wheel 392M Mar 28 20:18 disc1.iso.gz > -rw-r--r-- 1 root wheel 348M Mar 28 20:18 disc1.iso.xz > > Glen > How about 7zip (Windows program, not file format)? What would a Windows user use that can decompress gzip and not xz? It was a problem around ~2007, but xz support is no longer rare or exotic. - Nikolai Lifanov