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

Business analytics

The general concept of business analytics is to measure past business performance by using a combination of skills, methods, and techniques to gain insight into decisions when planning for the future of the business. Elasticsearch can provide data-driven insights to help solve problems and improve efficiency. Let's take an example to investigate closing-price changes by using the Morningstar category of commission-free ETF. Recall that, in the documentation of the cf_etf_hist_price index, introduced in Chapter 8, Aggregations Framework, has only a symbol field. There is no way to group the documents into such a category using only the cf_etf_hist_price index unless we manually attach the Morningstar_category field during the indexing operation. Of course, this can be solved programmatically. However, we will solve it by using only Elasticsearch with the...