[openstack-dev] [gate] RFC dropping largeops tests

Tim Bell Tim.Bell at cern.ch
Wed Feb 10 18:16:55 UTC 2016

On 10/02/16 18:48, "Clint Byrum" <clint at fewbar.com> wrote:

>Excerpts from Sean Dague's message of 2016-02-10 04:33:44 -0800:
>> The largeops tests at this point are mostly finding out that some of our
>> new cloud providers are slow - http://tinyurl.com/j5u4nf5
>> This is fundamentally a performance test, with timings having been tuned
>> to pass 98% of the time on two clouds that were very predictable in
>> performance. We're now running on 4 clouds, and the variance between
>> them all, and between every run on each can be as much as a factor of 2.
>> We could just bump all the timeouts again, but that's basically the same
>> thing as dropping them.
>> These tests are not instrumented in a way that any real solution can be
>> addressed in most cases. Tests without a path forward, that are failing
>> good patches a lot, are very much the kind of thing we should remove
>> from the system.
>I think we need to replace this with something that measures work
>counters, and not clock time. As you say, some of the other test suites
>out there already pick up a lot of this slack too. Also, I'm working at
>this as well with the counter-inspection spec, so hopefully dropping
>this now won't leave too much of a gap in coverage while we ramp up
>+1 to getting rid of it now, as instability in the test suites, which
>slows down development velocity, is worse than missing a few performance
>regressions in the corners.

I believe there is now a performance working group as part of the large deployments team (https://wiki.openstack.org/wiki/Performance_Team). Have they been contacted to
determine the alternative scenarios and how to strengthen the testing ?


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