On Thu, 2018-11-22 at 11:31 -0500, Josh Boyer wrote: > I'm concerned that this will effectively render EL RPM unable to > handle any Fedora RPMs at all. That's both a practical concern, as > many people develop Fedora using EL and vice versa, and also a broader > ecosystem concern. I would very much like for all of our > distributions to be able to more easily operate together, and this > effectively forks Fedora off into it's own space yet again. For what very little it's worth, a zchunked rpm is still a valid zchunk file, and you would be able to easily extract the payload and the header from a zchunked rpm on an EL system. In fact, because we're not planning to change the rpm header format at all, there could easily be a tool to convert a zchunked rpm into an xz or gzipped rpm (and vice versa). Having said that, there's a huge difference between this and having EL's RPM actually be able to read Fedora's RPMs. > Have we really looked at the wider scope of what a format change like > this would do in the context of some of the larger picture things > we're working on with lifecycle and cross-distro collaboration > efforts? I agree this would be better than delta RPMs when looking at > that *specific* usecase, but improving that (even with compose time > benefits) by doing a format change seems to be inflicting a very high > cost for what is an important but relatively small usecase. This is a really good point and I don't know know the answer. As per Neal's suggestion earlier in the thread, I posted this to the rpm- ecosystem mailing list. Michael from SUSE brought up some very valid concerns about how well zchunk would compare with deltarpm in delta efficiency, but apart from that, it's been pretty quiet there. If it's already obvious that the cost for this proposal isn't worth the gain, I do completely understand. If we're not sure, I'll do a proof- of-concept that converts standard rpms into zchunked rpms, so we can compare sizes and deltas, and hopefully get some data points on speed. Jonathan _______________________________________________ devel mailing list -- devel@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to devel-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://getfedora.org/code-of-conduct.html List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/devel@xxxxxxxxxxxxxxxxxxxxxxx
