Any chance that DVD deltaisos could be made available in the Fedora development process (with the F12 Alpha TC as the starting point) since the i686 rebuild and the switch to XZ payloads is now complete, and the F11 version of rpm now has XZ support? I realize that rsync was tried and failed, but unlike rsync, disos have been successfully used in OpenSUSE development for years - for example http://www.desktoplinux.com/news/NS5253529522.html and they work equally well on any RPM-based Linux distro such as Fedora. The disos for the F11 RC DVDs were typically about 5% of the size of the full ISOs. This can allow testers to get the images and provide feedback several hours sooner. The syntax for both creating and using them is trivial: makedeltaiso oldiso newiso deltaiso applydeltaiso oldiso deltaiso newiso as are the man pages for both commands. There is a mistake in the F11 man page description for applydeltaiso which has been fixed in Rawhide, and in any case shouldn't cause too much trouble, since the one-line Synopsis is correct and that's all one needs to know. Currently the alt.fedoraproject.org server has a directory for each of the three DVD images, each of which contains two files, the ISO and the corresponding CHECKSUM file. One deltaiso could be generated and put in each of these directories. The CHECKSUM file wouldn't have to change since it's only necessary to verify the output ISO.
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