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On 01/29/2018 07:47 AM, Jay Pipes wrote:

> What I believe we can do is change the behaviour so that if a 0.0 value is found
> in the nova.conf file on the nova-compute worker, then instead of defaulting to
> 16.0, the resource tracker would first look to see if the compute node was
> associated with a host aggregate that had the "cpu_allocation_ratio" a metadata
> item. If one was found, then the host aggregate's cpu_allocation_ratio would be
> used. If not, then the 16.0 default would be used.

Presumably you'd need to handle the case where the host is in multiple host 
aggregates that have "cpu_allocation_ratio" as a metadata item.  I think the 
AggregateCoreFilter uses the smallest ratio in this case.

Chris