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Formats supportedFormats supportedPosted Jan 5, 2008 20:25 UTC (Sat) by jengelh (subscriber, #33263)In reply to: Formats supported by sbergman27 Parent article: RPM 5.0 released
There are .patch.rpms, which contain full copies of all files that changed. Then there are .delta.rpms, which are deltas - and yes, I have to agree, applying deltarpms is not too fast. But that is a general thing about deltaing, not limited to rpms. As soon as transferring the full .rpm is faster than delting it up, deltarpms are useless unless you have a strict pay-per-byte pipe.
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Formats supported Posted Jan 6, 2008 7:36 UTC (Sun) by Richard_J_Neill (subscriber, #23093) [Link] Surely you don't have to maintain the original .rpm file to use a delta-rpm. The original .rpm could be re-constructed on the fly from the packages that it installed.
Formats supported Posted Jan 6, 2008 18:56 UTC (Sun) by MattPerry (guest, #46341) [Link] Unlikely as RPMs contain metadata and pre- and post-installation scripts that are not kept on the filesystem after installation.
Formats supported Posted Jan 6, 2008 19:01 UTC (Sun) by jengelh (subscriber, #33263) [Link] Scripts are kept. Otherwise, how would you run %preun and %postun? So yes, deltarpm magically takes both the rpmdb and the delta file and produces a full (non-delta, perhaps .patch) rpm out of it. And that takes a whee while.
Formats supported Posted Jan 7, 2008 15:21 UTC (Mon) by roblucid (subscriber, #48964) [Link] Actually OpenSuSE claims to do exactly that. The Online update takes a delta rpm, and constructs the new files from the old, plus what's in the rpm delta file. It generally works to!
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