[placement][nova][ptg] Resourceless trait filters

Eric Fried openstack at fried.cc
Wed Apr 10 15:37:08 UTC 2019

> So we have a specific use case: COMPUTE_TRUSTED_CERTS + NUMA requires 
> placement to support traits on RPs that are not providing resources. 
> Will in this case VCPU and MEMORY_MB always requested in the unnumbered 
> group still? Or there are cases when those resources are requested in a 
> numbered group?

That'll depend on the outcome of the various NUMA modeling discussions;
but as soon as we need to be able to request resources from more than
one NUMA node, it seems certain that we'll need to use numbered groups.


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