Book Image

Advanced Elasticsearch 7.0

By : Wai Tak Wong
Book Image

Advanced Elasticsearch 7.0

By: Wai Tak Wong

Overview of this book

Building enterprise-grade distributed applications and executing systematic search operations call for a strong understanding of Elasticsearch and expertise in using its core APIs and latest features. This book will help you master the advanced functionalities of Elasticsearch and understand how you can develop a sophisticated, real-time search engine confidently. In addition to this, you'll also learn to run machine learning jobs in Elasticsearch to speed up routine tasks. You'll get started by learning to use Elasticsearch features on Hadoop and Spark and make search results faster, thereby improving the speed of query results and enhancing the customer experience. You'll then get up to speed with performing analytics by building a metrics pipeline, defining queries, and using Kibana for intuitive visualizations that help provide decision-makers with better insights. The book will later guide you through using Logstash with examples to collect, parse, and enrich logs before indexing them in Elasticsearch. By the end of this book, you will have comprehensive knowledge of advanced topics such as Apache Spark support, machine learning using Elasticsearch and scikit-learn, and real-time analytics, along with the expertise you need to increase business productivity, perform analytics, and get the very best out of Elasticsearch.
Table of Contents (25 chapters)
Free Chapter
Section 1: Fundamentals and Core APIs
Section 2: Data Modeling, Aggregations Framework, Pipeline, and Data Analytics
Section 3: Programming with the Elasticsearch Client
Section 4: Elastic Stack
Section 5: Advanced Features

Index APIs

In the previous chapter, we gained basic knowledge of Elasticsearch. We also covered the latest features and breaking changes that were introduced in version 7.0. In this chapter, we will discuss the index APIs. Documents are indexed, stored, and made searchable by using the index API. The main purpose of an index is to logically group documents that have certain similar characteristics. An index is identified by a name (all in lowercase), and this name is referenced in index, search, update, and delete operations for the documents belonging to it.

In subsequent sections, you'll learn how to use index APIs to manage individual indices, index settings, aliases, and templates. Monitoring statistics for operations that occur on an index will also be covered. We will also look at index management operations, including refreshing, flushing, and clearing the cache.