mqtt mosquitto linux connection limit

Question

How are users getting past a 1024 connection limit in Linux in association with doing MQTT for push notification?

I am using Mosquitto server, which I think I read does

Answer 1

I don't know of anyone who has done volume testing of mosquitto to that number of connections. I suppose one thing you could do would be to test an instance of mosquitto on your chosen runtime and connect lots of client threads to it during your system testing.

IBM's implementation using WebSphere MQ as the MQTT broker has been shown to support up to 100,000 concurrent connections. I believe IBM's free broker RSMB is limited to 1024 connections.

You might want to consider how to scale out your broker using bridges and a provisioning service to work out which broker to connect new users to.