[Yum] Questions about headers ...

[seth vidal]

> This has been suggested before, and of course you can do it by hand, but
> bandwidth is bandwidth and once the headers have been created/compressed
> all you're really saving is the per-transfer overhead, not the bandwidth
> per se.

with keep-alive and http you're not gaining anything, really.


> >     Another question, would it not be better to just download the 
> > headers for the packages install on a PC that one would be doing an 
> > update on?
> 
> This won't work.  yum checks across ALL packages for dependencies and
> conflicts.  This is fairly complex, as a package may need another
> package or be needed BY another package, all recursively, until all
> dependencies are resolved.  So it isn't possible to predict ahead of
> time which package headers are needed.  One reason that yum functions so
> fast is BECAUSE it has a local copy of all of the headers.
> 

umm - yum only downloads the package headers that are either:
1. not already in the cache
or
2. not already an installed package.

it never downloads what it already has.

-sv