[rabbitmq-discuss] Clustering Question

Fri Jun 5 17:11:35 BST 2009

Hi Hugh,
Queue data is not replicated to other members of the cluster (whether it's a
persistent or non-persistent queue), so if a cluster member dies, all queue
data goes poof if it's non-persistent. However, if it is persistent, while
queue data doesn't go poof (still in the log) when you restart the node the
queue data won't auto replay into the cluster.  You'll have to do that
manually.

-J

On Fri, Jun 5, 2009 at 8:07 AM, Hugh Watkins <hwwatkins at gmail.com> wrote:

>
> I was trying to understand how the clustering support works in RabbitMQ
>
> 1) From the documentation the message queue data is not clustered, so if
> you have queue created on one machine and the queue is not persisted then
> that box going down will cause the queued messages to be destroyed. Is this
> a correct interpretation?
>
> I have a system that is creating perishable queue messages, i.e. they need
> to be acted on in 100-200 ms or it's to late a timeout will occur further up
> the chain.  I would like to setup a cluster an protect as many messages as
> possible.  It would not be worth creating a persistent queue  because it
> would slow down the processing and as I mentioned these are perishable
> messages.
>
> It seems like I should create different queues on each machine in the
> cluster and try to load balance across those queues, either by having the
> producers write too the local queue, round robin or some other mechanism.
>  The workers in turn would listen on all queues.  Does this sound
> reasonable?  It requires more configuration than I was hoping for because at
> least the workers have to be aware on another queue being created if another
> node is added.
>
> Thanks,
> Hugh
>
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