Book Image

Elasticsearch 8.x Cookbook - Fifth Edition

By : Alberto Paro
Book Image

Elasticsearch 8.x Cookbook - Fifth Edition

By: Alberto Paro

Overview of this book

Elasticsearch is a Lucene-based distributed search engine at the heart of the Elastic Stack that allows you to index and search unstructured content with petabytes of data. With this updated fifth edition, you'll cover comprehensive recipes relating to what's new in Elasticsearch 8.x and see how to create and run complex queries and analytics. The recipes will guide you through performing index mapping, aggregation, working with queries, and scripting using Elasticsearch. You'll focus on numerous solutions and quick techniques for performing both common and uncommon tasks such as deploying Elasticsearch nodes, using the ingest module, working with X-Pack, and creating different visualizations. As you advance, you'll learn how to manage various clusters, restore data, and install Kibana to monitor a cluster and extend it using a variety of plugins. Furthermore, you'll understand how to integrate your Java, Scala, Python, and big data applications such as Apache Spark and Pig with Elasticsearch and create efficient data applications powered by enhanced functionalities and custom plugins. By the end of this Elasticsearch cookbook, you'll have gained in-depth knowledge of implementing the Elasticsearch architecture and be able to manage, search, and store data efficiently and effectively using Elasticsearch.
Table of Contents (20 chapters)

ILM – managing the index life cycle

Index Lifecycle Management (ILM) in Elasticsearch is a system that allows you to set up policies to manage different aspects of your index life, such as the following:

  • Manage daily, weekly, and monthly indices with backup, optimization, and movement in the different serving tiers (hot and cold)
  • Create and switch to new indices when some indices reach a certain size or number of documents
  • Delete obsolete indices at the end of their life
  • Delete stale indices to enforce retention standards (that is, General Data Protection Regulation (GDPR) and 3-month retention)

ILM policies can be defined via an API or Kibana (go to Stack Management | Index Lifecycle Policies):

Figure 18.1 – The Kibana view of Index Lifecycle Policies

Getting ready

You need an up-and-running Elasticsearch installation, as we described in the Downloading and installing Elasticsearch recipe in Chapter 1...