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

Backing up

One of the most important tasks for the administrator is to make sure that no data will be lost in the case of a system failure. Elasticsearch, in its assumptions, is a resistant and well-configured cluster of nodes and can survive even a few simultaneous disasters. However, even the most properly configured cluster is vulnerable to network splits and network partitions, which in some very rare cases can result in data corruption or loss. In such cases, being able to get data restored from the backup is the only solution that can save us from recreating our indices. You probably already know what we want to talk about: the snapshot/restore functionality provided by Elasticsearch. Although we have covered the basics of the snapshot and restore functionality in previous editions of this book, we are going to cover it yet again in this chapter along with the cloud capabilities of the Elasticsearch backup functionality.

The snapshot API

The snapshot API, which is exposed by Elasticsearch...