MongoDB instance for cluster - Benchmark

[Fabio Cardoso]

Hello everyone; 

I have a cluster of Ant Media Server instances on AWS, and we use MongoDB to interconnect the instances of this cluster. 

The load balancer part was implemented outside AWS, using Firebase. However, MongoDB's work still needs to run on a machine on EC2. 

My problem is: What is the instance that this MongoDB machine needs to have?We do sporadic broadcasts, however, with a lot of people connected when they occur.For example: How much CPU and memory do I need in the Mongo DB instance to support 200 simultaneous connections? And 2000?Has anyone done this test and has data for me to rely on?