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

Restoring snapshots

Restoring a snapshot is very easy. A snapshot can be restored to other clusters to provide the cluster in which you are restoring it its compatible version.


You cannot restore a snapshot to a lower version of Elasticsearch.

While restoring snapshots, if the index does not already exist, a new index will be created with same index name and all the mappings for that index that were there before creating the snapshot. If the index already exists, then it must be in the closed state and must have the same number of shards as the index snapshot. The restore operation automatically opens the indexes after successful completion.

Example - restoring a snapshot

To take an example of restoring a snapshot from a repository es-backup and a snapshot name, snapshot_1, run the following command against the _restore endpoint on the client node:

curl -XPOST localhost:9200/_snapshot/es-backup/snapshot_1/_restore

This command will restore all the indices of the snapshot.

Elasticsearch offers...