[python-committers] PQM?

[Gustavo Niemeyer]

Hey Barry,

First, let me thank you for taking the energy to express many interesting
points in that discussion.

>> I don't have experience with PQM or something like it, but I suspect
>> it doesn't scale, and the buildbots are a better approach, because
>> they handle multiple platforms.
(...)
> - - PQM: right, doesn't scale across multiple platforms, but still valuable.
>  Guards against broken mainline affecting everybody.  E.g. would have caught
> the multiprocessing bug that delayed an earlier release affecting at least
> Linux and OS X.

I'm not sure I get what's the scaling issue here.  It's likely that
you guys have
some experience that I lack, and thus are talking about an obvious issue
that I'm not aware of.

We're actually adopting a PQM-based approach *precisely* because we have
to maintain a code base in multiple versions of the same platform, and thus
can't be sure that the tests will continue working just by running the suite in
our own environments.   In this case PQM will help precisely because running
tests locally "doesn't scale", which is why I'm a bit surprised by the
straightforward agreement on the point above.

What exactly is the "doesnt' scale" issue in this case?

-- 
Gustavo Niemeyer
http://niemeyer.net