dnf v.s. yum

[Jan Zelený]

On 16. 6. 2014 at 07:19:45, Stephen Morris wrote:
> On 06/15/2014 11:23 PM, Ed Greshko wrote:
> > On 06/15/14 19:02, Tim wrote:
> >> On Sun, 2014-06-15 at 18:27 +0800, Ed Greshko wrote:
> >>> OK....  I read FAQ.....
> >>> 
> >>> http://akozumpl.github.io/dnf/user_faq.html#why-do-i-get-different-resul
> >>> ts-with-dnf-update-vs-yum-update
> >>> 
> >>> And the one following it....  "Is it possible to force DNF to get the
> >>> latest metadata on dnf upgrade?"
> >>> 
> >>> Running KDE and the notifications in the systray showed there are 12
> >>> updates available.  Figured I give dnf a try, which I've done from
> >>> time to time, but it showed no packages to update.  OK....so clean
> >>> metadata for both yum and dnf....
> >>> 
> >>> ran both "yum check-update" and "dnf check-update".
> >>> 
> >>> yum listed the 12
> >> 
> >> And dnf offered nothing...
> >> 
> >> Is this just a case of whatever generates the metadata that yum uses,
> >> and whatever else generates the metadata that dnf uses, do their
> >> generation at different times?  Or do they actually have a different set
> >> of package files to look through?
> >> 
> >> I can't help but wonder what changing from yum to dnf will do for mirror
> >> sites.  Are we going to see a prolonged period where various mirrors
> >> stagnate?
> > 
> > Right....
> > 
> > But, now it does....  I thought "clean metadata" would have done it.... 
> > But, clean expire-cache seems to have done the trick.
> Can Yum cache updates and DNF cache updates interfere with each other?
> Since installing DNF I randomly get out of space conditions on cache
> updates which I have queried in another thread. I don't understand why
> this occurs when the file I think it is trying to update is 25 GB in
> size and there is 695 GB free space in the partition where the cache is.
> Have you experienced this sort of thing, or should I be raising a bug
> report (the issue with a bug report is at the moment I'm not sure if it
> is DNF or Yum producing the error message, and, if it is Yum, given that
> DNF is replacing Yum in Fedora 22 is anybody going to care anyway?).

Hi Steve,
I'm not sure I understand your situation entirely but the short version is: 
yum cache and dnf cache are two separate things so they do not interfere 
with each other.

May I ask what 25G file do you have on fs that needs updating? I have never 
seen rpms of such size and quite frankly I was under the impression that it 
wasn't even possible to build them using rpm until recently.

Thanks
Jan