LiveUSB and PackageKit Updates

[seth vidal]

On Tue, 2008-10-14 at 09:13 -0400, Jeff Weiss wrote:
> Jeff Weiss wrote:
> > Michael Solberg wrote:
> >> Hi!
> >>
> >> I'm sure someone's thought of this before, but I keep running into this
> >> issue on the LiveUSB on the XO.
> >>
> >> The issue is that /var/cache/yum is mounted as tmpfs on the Live image.
> >> When I log into a desktop session that already knows my wireless key,
> >> the updates applet attempts to download all the packages from Rawhide.
> >> This fills the 256MB of RAM pretty quickly and that hangs the machine.
> >> Does it make sense to turn that applet off in this case?  Or maybe not
> >> mount /var/cache/yum as tmpfs when there's an overlay?
> >>
> >> Michael.
> >>
> >>
> > 
> > This is two separate issues isn't it?  Doesn't /var/cache/yum get
> > written to whether you use the applet or yum on the command line?
> > 
> > My understanding of the overlay was that once you write something to it,
> > that space is gone forever, even if you delete those files.  So having
> > cache as part of the overlay will just make it fill up quicker.  And
> > aren't yum cache hits pretty unlikely?  Wouldn't it just be when someone
> > re-installs something they've uninstalled?  I would have thought tmpfs
> > is the way to go here - when end users run yum, it's better to
> > re-download than to use up the overlay - once that's gone, you're hosed.
> > 
> > Jeff Weiss
> > 
> 
> Er, on second thought there's really not much sense in eating up swap
> space.  Maybe we should just turn off the cache (keepcache=0) ?
> 
keepcache=0 just means that yum will automatically delete package files
it has installed/updated. Not that it won't hold a cache.


> I suspect that means it'll always have to download headers, but
> bandwidth is more plentiful than memory on the XO :)

headers have nothing to do with it.

-sv