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thx Clint! okay I will stick to RabbitMQ for now. Do you know any good
up2date guide for replacing RabbitMQ with ZeroMQ, or is the general
documentation http://docs.openstack.org/developer/oslo.messaging/zmq_driver.html
 have you tried this?

I'm also not sure if the ZeroMQ support is here to stay, or whether it
will be removed going forward. thx will

On Mon, Aug 15, 2016 at 3:24 AM, Clint Byrum <clint at fewbar.com> wrote:
> Excerpts from William Josefsson's message of 2016-08-14 15:39:06 +0800:
>> Hi everyone,
>>
>> I see advice in replacing RabbitMQ with ZeroMQ. I've been running 2
>> clusters Liberty/CentOS7 with RabbitMQ now for while. The larger
>> cluster consists of 3x Controllers and 4x Compute nodes. RabbitMQ is
>> running is HA mode as per:
>> http://docs.openstack.org/ha-guide/shared-messaging.html#configure-rabbitmq-for-ha-queues.
>>
>
> For 7 real computers, RabbitMQ is actually a better choice. You get
> centralized management and the most battle-tested driver of all.
>
> ZeroMQ is meant to remove the bottleneck and SPOF of a RabbitMQ cluster
> from much larger systems by making the data path for messaging directly
> peer-to-peer, but it still needs a central matchmaker database. So at
> that scale, you're not really winning much by using it.
>
> I can't really speak to the answers for your problems that you've seen,
> but in general I'd expect Liberty and Mitaka on RabbitMQ to handle your
> cluster size without breaking a sweat. Have you reported the errors as
> bugs in oslo.messaging? That might be where to start:
>
> https://bugs.launchpad.net/oslo.messaging/+filebug
>
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