Hw requirements - 5K users, 25-50 msgs/sec, QoS=1

[santif]

We're evaluating to migrate from a plain websocket based service to MQTT over websockets and QoS=1, using emqttd.
What are the minimum server requirements for 5K users? Clients don't send messages. The server sends 25-50 msgs/sec to all clients using QoS=1.. Each message has 100-150 bytes. Any help will be appreciated, thanks!

[emqplus]

@santif, Are your sure about your requirements? It means the broker should publish messages at the rate of 125K~250K msg/sec!

I write a new benchmark tool. Your could benchmark the case with the latest broker by yourself:

Subscribe with 5000 clients:

./emqtt_bench_sub -h 10.61.63.50 -i 10 -c 5000 -t bench -q 1

Publish messages at the rate of 10 msg/sec:

./emqtt_bench_pub -h 10.61.63.50 -c 1 -I 100 -t bench -q 1 -s 150