Book Image

Mastering Elasticsearch 5.x - Third Edition

By : Bharvi Dixit
Book Image

Mastering Elasticsearch 5.x - Third Edition

By: Bharvi Dixit

Overview of this book

Elasticsearch is a modern, fast, distributed, scalable, fault tolerant, and open source search and analytics engine. Elasticsearch leverages the capabilities of Apache Lucene, and provides a new level of control over how you can index and search even huge sets of data. This book will give you a brief recap of the basics and also introduce you to the new features of Elasticsearch 5. We will guide you through the intermediate and advanced functionalities of Elasticsearch, such as querying, indexing, searching, and modifying data. We’ll also explore advanced concepts, including aggregation, index control, sharding, replication, and clustering. We’ll show you the modules of monitoring and administration available in Elasticsearch, and will also cover backup and recovery. You will get an understanding of how you can scale your Elasticsearch cluster to contextualize it and improve its performance. We’ll also show you how you can create your own analysis plugin in Elasticsearch. By the end of the book, you will have all the knowledge necessary to master Elasticsearch and put it to efficient use.
Table of Contents (20 chapters)
Mastering Elasticsearch 5.x - Third Edition
About the Author
About the Reviewer
Customer Feedback

The store type

Elasticsearch exposes five store types that we can use. By default, Elasticsearch picks the best implementation based on the operating system environment. But you can override the default behavior in following ways:

  • The first way, is to set for all the indices, by adding the property inside the elasticsearch.yml file. For example, if you want to set the niofs store type to all the indices you can add following line inside elasticsearch.yml file: niofs 
  • The second way is to set per index at the index creation time in the following way:

curl -XPUT "http://localhost:9200/index_name" -d' { 
 "settings": { 
 "": "niofs" 

Let's see what these store types provide and how we can leverage their features.

The simple file system store - simplefs

The simplest implementation of the Directory class that is available is implemented using a random access file (Java RandomAccessFile