Yum curiosity: --obsoletes with update, useful or not?

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On Thu, 2006-04-27 at 14:12 +0100, Karanbir Singh wrote:
> William L. Maltby wrote:
> ><snip>

> >        If the --obsoletes flag is present yum will include package
> >        obsoletes in its calculations - this  makes it better for distro-
> >        version changes, for example: upgrading from somelinux 8.0 to
> >        somelinux 9.
> > 
> > Hmmm. Cell number 2 doesn't forget much. I recall several admonitions
> > that major upgrade should take the form of a new install. E.g. CentOS 3*
> > to CentOS 4*. The paragraph above *seems* to indicate that a major
> > upgrade might be doable? Moreover, it prompts the questions:
> > 
> > 1) "What are the downsides, if any?"
> > 2) "Has anybody tried it recently?"
> > 3) "Have any results to report?"
> > 
> > No pressing need, just curious.
> > 
> 
> yum will upgrade pkgs, but not all pkgs like that - eg. moving from
> kernel2.4 to 2.6 the 'centos way' - moving from devfs to udev, major
> python + rpm upgrade in itself.
> 
> check list history from early 2005, this move from centos3 -> centos4
> was documented and thrashed out a few times.
> 
> plus, packages change - not everything from el3 made it to el4 - and
> what about non core installed pkgs and install from source pkgs!

Thanks for taking the time. I had forgotten about those. I was mostly
hoping that use of plugins, yum improvements... might have resolved some
of the issues and maybe someone had tried more recently.

-- 
Bill
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