svn commit: r264027 - in head: release share/man/man7

[Brooks Davis]

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 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
numbers).

-- Brooks
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