svn commit: r264027 - in head: release share/man/man7
lifanov at mail.lifanov.com
Wed Apr 2 16:04:50 UTC 2014
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
>>> 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 at 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
> 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
> 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
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
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