[openstack-dev] Unwedging the gate

Robert Collins robertc at robertcollins.net
Mon Nov 25 09:30:11 UTC 2013

On 25 November 2013 22:23, Clint Byrum <clint at fewbar.com> wrote:

> I do wonder if we would be able to commit enough resources to just run
> two copies of the gate in parallel each time and require both to pass.
> Doubling the odds* that we will catch an intermittent failure seems like
> something that might be worth doubling the compute resources used by
> the gate.
> *I suck at math. Probably isn't doubling the odds. Sounds
> good though. ;)

We already run the code paths that were breaking 8 or more times.
Hundreds of times in fact for some :(.

The odds of a broken path triggering after it gets through, assuming
each time we exercise it is equally likely to show it, are roughly
3/times-exercised-in-landing. E.g. if we run a code path 300 times and
it doesn't show up, then it's quite possible that it has a 1%
incidence rate.


Robert Collins <rbtcollins at hp.com>
Distinguished Technologist
HP Converged Cloud

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