[Fedora-livecd-list] RFC- improving livecd installer efficiency

[Douglas McClendon]

Mark McLoughlin wrote:
> Hey,
> 	Okay, I follow you now. Doing:
> 
>   - Create snapshot of os.img
>   - Resize it down to the smallest possible size
>   - Copy it to disk
>   - Resize it back up to the size of the disk
> 
> 	has the dual advantages of being able to install to the small possible
> disk size and not copying unallocated blocks.
> 
> 	Sounds like a reasonable plan ... go ahead and give it a shot.
> 
> 	The reservation I'd have is if you're resizing down from 4G to 3G, the
> 1G of data blocks which have to be moved could potentially be at the end
> of the image. In that case, you'd need a 1G COW area for the snapshot.


The part of my theory that is supposed to cover that, is an extra 
minimize/truncate/sparsify_expand/maximize cycle on the image just before it 
gets burned in the squashfs.  Fingers crossed...


> 
> 	It'd be much better if you could resize filesystem as you're copying
> it, and that should be possible, but you'd have to e.g. add support for
> copying to resize2fs.

Sort of another way of saying "add in-flight-resize2fs support to e2cp" ;)

-dmc

> 
> Cheers,
> Mark.
> 
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