I have worked on a environment for two years with approx. 20 clusters of IS pairs (divided by different DCs) connecting two broker territories (which were in turn connected using gateways and were also distributed in the DCs).
One of the territories had some ~1000 single IS connected, with an excess of 20 connections each.
The biggest challenge was distributing the load on the brokers.
But apart from that, most inter-cluster communication was pretty straightforward.
What are the main challenges on your environment?
Best Regards,
Gerardo Lisboa
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