In the previous chapter, we discussed how to alter the Apache Lucene scoring by using different similarity methods. We indexed and searched our data in a near real-time manner, and we also learned how to flush and refresh our data. We configured the transaction log and the throttled I/O subsystem. We talked about segment merging and how to visualize it. Finally, we discussed federated search and the usage of tribe nodes in Elasticsearch.
In this chapter, we will talk more about the Elasticsearch configuration and new features introduced in Elasticsearch 1.0 and higher. By the end of this chapter, you will have learned:
Configuring the discovery and recovery modules
Using the Cat API that allows a human-readable insight into the cluster status
The backup and restore functionality
Federated search