[ubuntu-cloud] size of uec images

Steve Langasek steve.langasek at ubuntu.com
Thu Oct 8 13:49:35 BST 2009

On Thu, Oct 08, 2009 at 01:07:12PM +0200, Soren Hansen wrote:

> > My understanding is that images have to be uncompressed for rebundling
> > on the end user's system before they can be used on UEC anyway, right?
> > In that case, 'tar xf' should be no harder than 'gunzip', hopefully
> > it's just a small documentation change.
> Another good reason to make this change: The bundling tool actually does
> exactly what you suggest: It "tar -S | gzip"'s the image. We could
> potentially add an option to the bundling tool to tell it that the image
> is already in that format, so that we could skip the decompress step
> altogether.

<cough> then that's a very good reason to make the change, since 'tar -S'
only does anything useful if the input file is a sparse file, and an img.gz
is never going to be sparse. :)

> > Is there any reason we can't ship these as img.tar.gz instead of
> > img.gz?

> The only reason I can think of is that there are already scripts "out
> there" that fetch these images expecting to be able to unpack them in a
> particular way.

Given that the size of the UEC images seems to also be a bottleneck fore
milestone testing (from some of the comments I saw during beta validation),
I think pushing fixes to those scripts is going to be less of a problem than
continuing with the status quo.

Steve Langasek                   Give me a lever long enough and a Free OS
Debian Developer                   to set it on, and I can move the world.
Ubuntu Developer                                    http://www.debian.org/
slangasek at ubuntu.com                                     vorlon at debian.org
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