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)

Creating a low-level Elasticsearch client

There are two official Elasticsearch clients: the low-level one and the new typed one available from Elasticsearch 8.x (https://github.com/elastic/elasticsearch-java). The low-level one is used to communicate with Elasticsearch, and its main features are as follows:

  • Minimal dependencies
  • Load balancing across all available nodes
  • Failover in the case of node failures and upon specific response codes
  • Failed connection penalization (whether a failed node is retried depends on how many consecutive times it failed; the more failed attempts, the longer the client will wait before trying that same node again)
  • Persistent connections
  • Trace logging of requests and responses
  • Optional automatic discovery of cluster nodes

Getting ready

You need an up-and-running Elasticsearch installation, which can be obtained as described in the Downloading and installing Elasticsearch recipe in Chapter 1, Getting Started.

To...