If you decided to scale your app horizontally, by default Meteor Streams works within a single instance only. As an example lets say you are going to have 3 meteor instances (A, B, C). Now events emitted from instance A cannot be listen from B or C.

But simply integrating Meteor Cluster you can remove this limitation. See below for the integration.

We assume your app runs on locally, and a local redis-server is running. See here for advanced Meteor Cluster configuration.

• Add cluster smart package with mrt add cluster
• Sync streams with cluster as shown below

Add following content to cluster.js

if(Meteor.isServer) {
  Meteor.startup(function() {
    Meteor.Cluster.init();
    //stream1, stream2 are the Meteor Streams available on your app
    Meteor.Cluster.sync(stream1, stream2);
  });
}

• Now you can start as many as meteor instances you want

Notes

• Introduction to Meteor Cluster
• How to scale and load balance your meteor app