Book Image

Learning Elasticsearch

By : Abhishek Andhavarapu
Book Image

Learning Elasticsearch

By: Abhishek Andhavarapu

Overview of this book

Elasticsearch is a modern, fast, distributed, scalable, fault tolerant, and open source search and analytics engine. You can use Elasticsearch for small or large applications with billions of documents. It is built to scale horizontally and can handle both structured and unstructured data. Packed with easy-to- follow examples, this book will ensure you will have a firm understanding of the basics of Elasticsearch and know how to utilize its capabilities efficiently. You will install and set up Elasticsearch and Kibana, and handle documents using the Distributed Document Store. You will see how to query, search, and index your data, and perform aggregation-based analytics with ease. You will see how to use Kibana to explore and visualize your data. Further on, you will learn to handle document relationships, work with geospatial data, and much more, with this easy-to-follow guide. Finally, you will see how you can set up and scale your Elasticsearch clusters in production environments.
Table of Contents (11 chapters)
10
Exploring Elastic Stack (Elastic Cloud, Security, Graph, and Alerting)

Indexing and Updating Your Data

In the previous chapter, we discussed how to model your data. In this chapter, we will discuss how to index and update your data. We will start by discussing how to index and what happens when you index a document. Elasticsearch is a near real-time system, meaning the data you index is available for search only after a small delay. We will discuss the reason for this delay and how we can control the delay. This chapter will also show you various ways to update your data and we will discuss what happens when you update a document and why updates are expensive.

In this chapter, we will cover the following:

  • Indexing your data
  • Updating your data
  • Using Kibana to discover
  • Using Elasticsearch in your application
  • How Elasticsearch handles concurrency
  • How primary and replica shards interact