[rabbitmq-discuss] active active solution over wan and lan

[Mysurf Mail]

>From the active/active documentation -
we have developed active/active high availability for
queues<http://www.rabbitmq.com/ha.html>


   "This solution still requires a RabbitMQ cluster, which means that it
will not cope

    seamlessly with network partitions within the cluster and, for that
reason, is not

    recommended for use across a WAN (though of course, clients can still
connect from

    as near and as far as needed)"

What does it mean "not recommended for use across a WAN"?
I cant understand this remark - If I buy three machines on ec2 will I need
to establish a domain controller/dns server?
What does this restriction mean? and why?
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