[openstack-dev] [oslo.messaging][zeromq] Next step

Joshua Harlow harlowja at outlook.com
Sat Jun 20 14:54:19 UTC 2015

Alec Hothan (ahothan) wrote:
> Do we have a good understanding of what is expected of zmq wrt rabbitMQ?
> Like in what part of the bell curve or use cases would you see it? Or
> indirectly, where do we see RabbitMQ lacking today that maybe ZMQ could
> handle better?
> I have tried to find any information on very large scale deployment of
> OpenStack and could not get a firm number (in terms of number of compute
> nodes).

Jump on #openstack-operators and ask around around, I can likely get you 
some *ballpark* numbers to but folks in that channel may be able to 
provide you some as well...

> Does the OpenStack foundation keeps track of this information somewhere?
>    Alec
> On 6/19/15, 12:56 AM, "Thierry Carrez"<thierry at openstack.org>  wrote:
>> Flavio Percoco wrote:
>>> There's a 95% of deployments using rabbit not because rabbit is the
>>> best solution for all OpenStack problems but because it was the one
>>> that works best now. The lack of support on other drivers caused this
>>> and as long this lack of support on such drivers persist, it won't
>>> change.
>> There is 95% of deployments using rabbit because RabbitMQ serves the
>> middle of the Bell curve of the use cases perfectly well.
>> For OpenStack to be ubiquitous, we need to extend beyond our comfort
>> zone of use cases and support technology that will let us address those.
>> I see zmq has an enabler for that: it will solve other classes of
>> problems triggered by extreme use cases.
>> So yes, obviously RabbitMQ dominance should (and will naturally) drive
>> the development and maintenance efforts. But we should at least try to
>> not make the lives of those who explore new trails (and reach to new use
>> cases) miserable.
>> --
>> Thierry Carrez (ttx)
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