Elasticsearch Cluster Sizing and Performance Tuning

How many nodes should my cluster have? How many replicas should I create? What is the optimal average shard size for the best searching performance? Blah blah… All these questions have only one answer: ‘Nobody knows but you can!’ No one could know your data, query structure, the hardware you work with, and the throughput you have. Unfortunately, there is no mathematical formula or theoretical calculation method to provide a definitive answer. I’m sorry if this disappoints you, especially if that was your expectation. But don’t worry, I will help guide you in finding a…