[rabbitmq-discuss] conceptual question

Jim Stabile jstabile1 at vmware.com
Sun Apr 11 19:52:47 BST 2010


What is the current status of this?  I want to use RabbitMQ across a WAN. 
One publisher connected to a RabbitMQ server and a set of subscribers
connected to another RabbitMQ server (both servers in a cluster) over a WAN. 
When a publish occurs, I want only 1 message to be sent from the publisher's
server to the subscriber's server (over the WAN) and then the fan-out
happens to all subscribers (last-mile fan-out).  I'm looking at RabbitMQ
1.7.2.  Has this been addressed?  If not, is there a timeframe?  


Matthias Radestock-2 wrote:
> Alexis Richardson wrote:
>> I am fairly sure that....
>> On Fri, Jul 3, 2009 at 7:38 PM, <Ken.Anderson at sungard.com> wrote:
>>> Sorry to interject here, but I'm curious as to the answer as well.
>>> I'm assuming the question is related to performance - does the
>>> message make on hop between nodes, and then get distributed,
>> Yes.
> Actually, the answer, at present, is 'no', though it used to be 'yes'.
> We disabled the optimisation which sends just one copy of the message to
> a node on which multiple destination queues reside, since it broke some
> of AMQP's ordering guarantees. A fix for that, allowing us to re-enable
> the optimisation, is on our todo list.
> Matthias.
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