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Re: Anaconda: good work!



Bill Nottingham wrote:
Jon Burgess (jburgess uklinux net) said:
Chris Lumens wrote:
We can't really do this easily.  Making a new anaconda means making new
first and second stage images, which means making new CD and DVD images,
which means a huge headache for mirrors and for keeping track of all
these versions of images floating around.
Using Jigdo http://atterer.net/jigdo/ could help reduce the amount of data needed to be stored by the mirrors for a re-spun CD/DVD ISOs. It reduces the amount of data to be downloaded if the user already has the original ISOs.

It also allows enables other things like making a set of CD ISOs from the RPMS on a DVD ISO (or the reverse).

I see it has just been added to extras-devel if anyone wants to try it out.

If someone wants to post example jigdo stuff we could put on the
mirror master, that would be great. Not sure it's practical for rawhide,
though, as we really don't even want to go to the effort of spinning
isos for that.

Bill


I've just created jigdo and template files for the FC5 i386 and x86-64 CD and DVD ISOs. See http://www.jburgess.uklinux.net/jigdo/

To install Jigdo on FC5:

# yum --enablerepo=extras-development install jigdo

To get it to build the i386 disc1 ISO:

# jigdo-lite http://www.jburgess.uklinux.net/jigdo/FC-5-i386-disc1.jigdo

Jigdo has already come in useful for me. I've been able to convert the DVD ISOs which I downloaded via Bittorrent into the CD ISOs and rescue CD without having to download any extra fies.

The jigdo and template files are tiny. Less than 2MB per architecture. I think that they would make a useful addition to a future Fedora release.

The Debian ISO process appears to use a patched mkisofs which generates the jigdo meta files at the same time that the ISOs are created. See http://www.einval.com/~steve/software/JTE/

I'm sure the download options could do with a little work. The jigdo file currently specifies http://download.fedoraproject.org as the download location so it gets redirected off to a new mirror for every file that it tries to download. It looks like Jigdo has some hard coded behaviour for selecting Debian mirrors, I guess we could do something similar for Fedora and perhaps utilise the yum mirrorlist file.

	Jon


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