Summary
In this chapter, you looked at the basic concepts of an Elasticsearch cluster and saw the core components of it. After this, we discussed how to configure a cluster correctly. Finally, we discussed choosing the right amount of shards and replicas. In the next chapter, you will learn tips to improve indexing performance. We will look at the memory setting and how the optimization of mapping definition improves index performance. In addition, we will examine segment merge policy and will look at some relevant cases related to this topic. And, finally, we will look at the bulk API.
