Understanding Prioritization

[Eli Wapniarski]

On Thursday, 22 בDecember 2005 07:13, Eli Wapniarski wrote:
> On Thursday, 22 בDecember 2005 01:12, Gustavo Niemeyer wrote:
> > > What kind of spread are we talking about? Nothing as yet has been
> > > explained very weill? The numbers themselves are not positive but
> >
> > In my answer to your original email:
> >
> > """
> > A package priority is currently considered in two distinct moments:
> > [...]
> > 2) When there are multiple alternatives for satisfying a dependency,
> >    a package having a higher priority has more chances of being
> >    selected to satisfy the dependency. That's not an isolated
> >    decision though. For instance, if installing a package with a
> >    higher priority would mean including dozens of other dependencies,
> >    the priority *difference* between the higher priority package and
> >    the other packages should be big enough to justify the change.
> > """
> >
> > I'm trying to explain, I'm trying to colaborate, but you must
> > help a bit as well. ;-)
> >
> > > negative numbers (as suggested by the FAQ). I have put the priorities
> > > negative numbers leaving the top kde-redhat repos at default that is,
> > > priority 0 (as suggested by the FAQ).
> > >
> > > So. again the kde-redhat as priority 0, Freshrpms as -1 (negative 1)
> > > and fc4 repos at (-5). Could please suggest appropriate values.
> >
> > Try e.g. -1000 for the repository you don't want to upgrade from,
> > for instance.
>
> Forgive me... I guess, I'm just not getting it. Let me see if I get this
> right. I'm going to go in the opposite direction.
>
> I want all the packages in the kde-redhat channels (stable, stable all,
> testing, testing all) to take top priority over everything. So I'm going to
> always get the upgrades from kde-redhat, and no other channels will ever
> supersede the packages from kde-redhat. So in order to do that I'll give
> the chanels (4 of them to be exact) a priority of 1000.
>
> Next, I want Freshrpm packages. I want to set the priority so that any
> package that exists in the Freshrpms channel will get upgraded. I also want
> that it should never supercede packages from kde-redhat. And I want to be
> sure that those packages will never get superceded by any of the other
> repositories that I'm using. So I'll give it a priority of 800 (is that
> enough)?
>
> After that, the 3 fc4 channels (os, updates, extras). Same deal. Won't ever
> supercede Freshrpms and kde-redhat, but everything else that I'm using will
> never supercede an fc4 channel so I'll give it a priority of 600 (is that
> enough)?
>
> After that Livna with a priority of (400).
>
> After that rpmforge and macromedia with priority of 200. Actually, the
> macromedia channel can be given just about anything as there is only one
> package in the channel, and that's the flash-plugin.
>
> The local rpm-db is left at default with a priority of 0.
>
> Am I getting, it? Will this ensure that I will get what I want, reliably?
> Anything else you can suggest before I make the alterations? Should I make
> these alterations?
>
> I'm sure that with you're help we're going to get this to work.
>
> Eli

With the changes that I'm asking about, I get from

APT-GET (this is what I'm expecting)
----------------------------------------------------
The following packages will be upgraded
   kdemultimedia (3.5.0-1.7.fc4.kde => 3.5.0-3.fc4.kde)
   kdemultimedia-devel (3.5.0-1.7.fc4.kde => 3.5.0-3.fc4.kde)
   kdemultimedia-extras (3.5.0-1.5.fc4.kde => 3.5.0-3.fc4.kde)
   libtunepimp (0.4.0-2.fc4 => 0.4.0-4.fc4)
   mplayerplug-in (3.17-fc4 => 3.17-1.2.fc4.rf)
   openslp (1.2.1-2.fc4 => 1.2.1-4.fc4)
   openslp-devel (1.2.1-2.fc4 => 1.2.1-4.fc4)


SMART (replacing and downgrading packages I don't want)
----------------------------------------------------------------------------------------
Upgrading packages (12):
  kdemultimedia-6:3.5.0-3.fc4.kde at i386
  kdemultimedia-devel-6:3.5.0-3.fc4.kde at i386
  kdemultimedia-extras-6:3.5.0-3.fc4.kde at i386
  libtunepimp-0.4.0-4.fc4 at i386
  mplayerplug-in-3.17-1.2.fc4.rf at i386
  openslp-1.2.1-4.fc4 at i386
  openslp-devel-1.2.1-4.fc4 at i386
  postgresql-jdbc-8.0.5-1.FC4.1 at i386
  scribus-1.3.1-0.2.fc4.rf at i386
  webmin-1.250-1.2.fc4.rf at noarch
  wxGTK-2.6.2-0.2.2.fc4 at i386
  wxGTK-gl-2.6.2-0.2.2.fc4 at i386

Downgrading packages (4):
  boost-1.32.0-6 at i386
  kdeedu-3.5.0-0.1.fc4 at i386
  perl-3:5.8.6-18 at i386
  scribus-templates-1.2.1-0.fdr.0 at noarch

Removed packages (6):
  audacity-1.2.3-5 at i386                  kdeedu-devel-3.5.0-1.0.fc4.kde at i386
  boost-devel-1.33.0-3.0.fc4.kde at i386    scorched3d-37.2-2 at i386
  boost-doc-1.33.0-3.0.fc4.kde at i386      wxPythonGTK2-2.4.2.4-7 at i386