Zsync for ubuntu isos.

Colin Watson cjwatson at ubuntu.com
Mon Mar 3 17:24:11 UTC 2008

[Reposting my reply from sounder at .]

On Sun, Mar 02, 2008 at 08:45:44PM +0900, John McCabe-Dansted wrote:
> Zsyncing ubuntu-7.10-desktop-i386.iso to xubuntu saves ~63% of
>  bandwidth over downloading the xubuntu.iso directly. Zsyncing 7.10 to
>  Hardy alpha-4 saves ~14% of bandwidth; presumably zsyncing between
> different alphas saves more than this.
>  However Zsync requires .zsync files to be available some where on the net.
>  Perhaps we should add .zsync files to the cdimages directories?

As far as I can see, zsync is rsync for when you can't actually use
rsync due to lack of server support. However, cdimage does support
rsync, so why not just use that directly?

>  (I am testing ubiquity, so I'd like to keep my Hardy iso up-to-date
> without blowing my quota.
> Also, I notice that manifest and list files are available. Is there
> a way to actually use these to build the livecd?)

No, I'm afraid not; they're just for information.

Colin Watson                                       [cjwatson at ubuntu.com]

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