[openstack-dev] [nova] A prototype implementation towards the "shared state scheduler"

Ed Leafe ed at leafe.com
Wed Feb 24 16:57:13 UTC 2016

On 02/24/2016 05:56 AM, Chris Dent wrote:

>> I'd actually also be interested if this has a potential to reduce the
>> demand on the message bus. I've been investigating this for a while,
>> and I
>> found that RabbitMQ will happily consume 5 high end CPU cores on a
>> single box
>> just to serve the needs of 1000 idle compute nodes.
> What do we need to do, as a community, to start treating and
> thinking about this problem as a bug rather than something we have
> to deal with or work around? "Fear of messaging" is putting a big
> limitation on our possible solutions to a fair few problems (notably
> scheduling).

Some chatter is necessary to assure system health, but yeah, this should
be considered a bug. I'm sure that if a RabbitMQ expert were able to
observe this, the response would be "you're doing it wrong", and we
might fix this.


-- Ed Leafe

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