That's for the standard full mesh clustering, Erlang distribution can be further tuned with hidden nodes, etc. I think WhatsApp scaled clusters to 10_000 nodes[

That's for the standard full mesh clustering, Erlang distribution can be further tuned with hidden nodes, etc. I think WhatsApp scaled clusters to 10_000 nodes[1]. I personally only run max 10 nodes Erlang cluster (on physical servers) in production, and ~ 20 on AWS for dev/testing workloads. But I think it's better to have a federation of smaller clusters, or separate cluster per datacenter/AZ. Erlang distribution isn't a silver bullet, though. But for 80% of cases it's enough. --- [1] Scaling Erlang cluster to 10,000 nodes https://codesync.global/media/maxim-fedorov-scaling-erlang-cluster-to-10-000-nodes/ https://codesync.global/media/maxim-fedorov-scaling-erlang-c...