[rabbitmq-discuss] Cluster capability?

Paul Bell arachweb at gmail.com
Sun Dec 22 17:52:50 GMT 2013

Thanks, Michael.

I was looking at http://www.rabbitmq.com/shovel.html when your post
appeared. The language on that page speaks in terms of source and
destination brokers. Does this mean that Shovel is one way? Put otherwise,
if Cluster 1 is source and Cluster 2 destination, can Cluster 2 also act as
source; or would such a configuration/use require 2 Shovels, one for each


On Sun, Dec 22, 2013 at 12:42 PM, Michael Klishin <
michael.s.klishin at gmail.com> wrote:

> 2013/12/22 Paul Bell <arachweb at gmail.com>
>> a. First, do I rightly assume that it's possible to connect HA clusters
>> via Shovel?
> Yes. Shovel or (exchange) Federation.
>> b. If my component on cluster A publishes a message to its local broker,
>> will that message get sent via Shovel to the remote cluster? I think what
>> I'm asking here concerns whether or not *my* component must publish to the
>> Shovel itself, or does the cluster "know" to propagate the message via
>> Shovel? I ask this because I'm wondering how far I can push the mirroring
>> capabilities of the logical broker. I seem to recall that the local end of
>> a Shovel would appear to local components as a regular exchange.
> Shovel and exchange federation basically replicate message streams of an
> exchange
> to another node/cluster. Queue federation distributes queue contents
> between nodes/clusters
> (this is NOT replication but rather a form of partitioning).
>> c. Finally, does Shovel permit more than two peer clusters or, if I had 3
>> clusters, would I need 3 Shovels interconnecting them?
> Shovel connects two nodes. You can connect node A to B, then B to C.
> --
> MK
> http://github.com/michaelklishin
> http://twitter.com/michaelklishin
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