On 2014-04-02 11:23, Nikolai Lifanov wrote:
On 04/02/14 12:06, Glen Barber wrote:
On Wed, Apr 02, 2014 at 11:55:33AM -0400, Nikolai Lifanov wrote:
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.
I don't know, to be honest. I have no Windows machines to test, so
I can only go by what I am told.
Glen
I just verified it with 7zip for Windows version 9.22. It extracts
.tar.xz archives and decompresses .xz images.
- Nikolai Lifanov
My concern was requiring a *specific* tool to extract the ISO. However I
do see that Winzip and Winrar both now support XZ as well.
--
Regards,
Bryan Drewery
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