On 10/06/2014 06:53 PM, Jonathan Dieter wrote: >> Get to coding. ;) > > As mentioned elsewhere, the problem *is* signatures. yum (quite > rightly) refuses to install an rpm whose signature doesn't match the one > in the primary repodata. And I believe that the signature in the RPM is > also over the whole compressed rpm. To make this work, we'd need to add > an "uncompressed" signature for every package to the primary repodata as > well as probably the rpms themselves. > > We have already written the code to have yum run applydeltarpm in > parallel according to the number of processors on a system, but it > remains a single-threaded application that spends most of its time > recompressing the data. The way of getting around all this unnecessary computation is establishing trust via the deltarpm itself and giving up the idea of reconstructing the originally rpm as a prove of everything worked out just fine. To save even more time the delta would need to be applied directly on disk without creating an package at all. This would require a deeper integration with rpm and requires some tricky algorithms to make sure everything is ok in advance and won't blow up during the rpm transaction. So if anyone needs a hobby... Florian -- Red Hat GmbH, http://www.de.redhat.com/ Registered seat: Grasbrunn, Commercial register: Amtsgericht Muenchen, HRB 153243, Managing Directors: Charles Cachera, Michael Cunningham, Michael O'Neill, Charles Peters -- devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxxx https://admin.fedoraproject.org/mailman/listinfo/devel Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct
