How to configure nodes of a cluster to share equal load?

I had combined two nodes

both are data nodes,one master another is slave.

upon load load testing on single node and a cluster i wont see any differences in Throughput.

is there any ways to configure nodes of a cluster to share equal load

If you have replicas, you probably won't see the difference.

Add one more node or set replicas to 0. That could help.