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<H1>[Mageia-dev] How broken are RPM dependencies allowed to be?</H1>
<B>Thierry Vignaud</B>
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TITLE="[Mageia-dev] How broken are RPM dependencies allowed to be?">thierry.vignaud at gmail.com
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<I>Wed Dec 14 12:31:36 CET 2011</I>
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<PRE>On 14 December 2011 10:14, Dan Fandrich <<A HREF="https://www.mageia.org/mailman/listinfo/mageia-dev">dan at coneharvesters.com</A>> wrote:
><i> I can understand that my particular case is unsupported, but I described
</I>><i> a different, supported, scenario that would also fail due to this problem.
</I>><i> To reiterate, a distribution upgrade from 1 to 2 (once it's finalized)
</I>><i> could involve urpmi first upgrading the perl-dependent package but avoid
</I>><i> installing the new perl itself until the end of the upgrade, which could be
</I>><i> hours or (if interrupted) days later.
</I>
This is bullshit.
urpmi will upgrade perl itself first (with glibc, rpm & perl-URPM).
><i> During the entirety of that time,
</I>><i> that package would be unusable. If that package happened to be a key CGI
</I>><i> script for a web site, the entire site would be down for that entire time.
</I>
This is totally unrealistic.
If someone is fool enough to perform a live upgrade on a server
still serving requests, it deserves being shoot. Twice.
One usually pulls a server out of trafic, upgrade it, then put it back
in use. And keeps HA by keeping another old server responding.
That's not a valid use case.
>><i> Installing packages individually from one release on another release is not
</I>>><i> supported. Either upgrade the entire distro first, or stick to packages from
</I>>><i> the version you are on. However 'upgrade from release to Cauldron', when done
</I>>><i> correctly, should usually work as expected.
</I>><i>
</I>><i> Yes, "usually". Is Mageia the operating system that works reliably 95% of the
</I>><i> time?
</I>
This will break on every distro.
>><i> But, in supported use cases, urpmi *does* ensure that all the pieces to keep
</I>>><i> urpmi are upgraded in one transaction.
</I>><i>
</I>><i> But only if the dependencies are set correctly. And my original bug report on
</I>><i> that has just now been closed as WONTFIX.
</I>
Once again, your report has nothing to do with urpmi.
Urpmi doesn't depends on quite a lot of packages and
it WILL upgrade them first then restart.
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