Book Image

Elasticsearch 7 Quick Start Guide

By : Anurag Srivastava, Douglas Miller
Book Image

Elasticsearch 7 Quick Start Guide

By: Anurag Srivastava, Douglas Miller

Overview of this book

Elasticsearch is one of the most popular tools for distributed search and analytics. This Elasticsearch book highlights the latest features of Elasticsearch 7 and helps you understand how you can use them to build your own search applications with ease. Starting with an introduction to the Elastic Stack, this book will help you quickly get up to speed with using Elasticsearch. You'll learn how to install, configure, manage, secure, and deploy Elasticsearch clusters, as well as how to use your deployment to develop powerful search and analytics solutions. As you progress, you'll also understand how to troubleshoot any issues that you may encounter along the way. Finally, the book will help you explore the inner workings of Elasticsearch and gain insights into queries, analyzers, mappings, and aggregations as you learn to work with search results. By the end of this book, you'll have a basic understanding of how to build and deploy effective search and analytics solutions using Elasticsearch.
Table of Contents (10 chapters)

Metrics aggregations

The metrics aggregation family computes metrics based on values collected from the aggregated documents. Numeric metrics aggregations are a special kind of metrics aggregations that output numeric values. single-value numeric aggregations are aggregations that output a single numeric metric, and multi-value numeric metrics aggregations return multiple metrics. This is an important distinction when the aggregations are used as a sub-aggregation within a bucket aggregation. The following are some of the main metrics aggregation types:

  • Avg aggregation
  • Weighted avg aggregation
  • Cardinality aggregation
  • Extended stats aggregation
  • Max aggregation
  • Min aggregation
  • Scripted metric aggregation
  • Stats aggregation
  • Sum aggregation

Now, let's cover these aggregation types in detail.