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Re: CD sizes again (and BoF reminder!)



On Sun, Jul 08, 2012 at 12:03:44AM +0200, Cyril Brulebois wrote:
> Ansgar Burchardt <ansgar@debian.org> (07/07/2012):
> > Another question is if the release team would consider unblocking
> > updated packages (with just the switch to xz for binaries).  I think
> > it would be nice to be able to get a useful desktop system using just
> > the first CD, but I'm not sure if they would make an exception for
> > this.
> 
> You may want to actually ask the release team at some point, if you want
> to know. Just saying…

Thanks for the brilliant idea! :-)

Oh all mighty release team,
  Ansgar has been experimenting with .deb sizes to make the packages
needed for a minimal desktop installation fit in the first CD. It looks
like that's doable by switching to xz compression for the involved
binaries. Would you grant freeze exceptions for packages that only
changes that?

See attached email and the corresponding thread on -devel for more info.

Thanks!
Cheers.
-- 
Stefano Zacchiroli     zack@{upsilon.cc,pps.jussieu.fr,debian.org} . o .
Maître de conférences   ......   http://upsilon.cc/zack   ......   . . o
Debian Project Leader    .......   @zack on identi.ca   .......    o o o
« the first rule of tautology club is the first rule of tautology club »
--- Begin Message ---
Steve McIntyre <steve@einval.com> writes:
> On Fri, Jul 06, 2012 at 09:00:32PM -0600, Ansgar Burchardt wrote:
>>I tried recompressing all packages in wheezy with xz.  The total size
>>for all amd64+all packages was reduced from 42GB to 33 GB (about 20%).
>>A per-package listing is available from [1]
>>
>>  [1] <http://people.debian.org/~ansgar/wheezy-20120706-with-xz.txt.gz>
>>
>>Would this be enough to make GNOME and/or KDE installable from a single
>>CD image?
>
> Using rough calculation:
>
>  * For GNOME, it takes about 185MB out of the space used to get up to
>    task-gnome-desktop. Instead of being ~90MB into CD#2, that's ~100MB
>    inside CD#1.
>
>  * For KDE, it takes about 170MB out of the space used to get up to
>    task-kde-desktop. Instead of being ~70MB into CD#2, that's ~100MB
>    inside CD#1.
>
> So, yes - looks like xz will make a difference here for the wheezy
> release, for amd64 at least. It's enough that we'd probably even have
> space for the installation manual and release notes to fit \o/.
>
> i386 is still worse off (2 kernels instead of 1), but I don't have the
> exact figures to hand.

We need a safety margin as the base system must continue to use gzip
compression.  But my feelings say that 100 MB should be enough for that.

Another question is if the release team would consider unblocking
updated packages (with just the switch to xz for binaries).  I think it
would be nice to be able to get a useful desktop system using just the
first CD, but I'm not sure if they would make an exception for this.

Ansgar


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