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
1
Section 1: Fundamentals and Core APIs
8
Section 2: Data Modeling, Aggregations Framework, Pipeline, and Data Analytics
13
Section 3: Programming with the Elasticsearch Client
16
Section 4: Elastic Stack
20
Section 5: Advanced Features

Spark and Elasticsearch for Real-Time Analytics

In the previous chapter, we looked at the machine learning feature of Elastic Stack. We used a single metric job to track one-dimensional data (with the volume field of the cf_rfem_hist_price index) to detect anomalies by using Kibana. We also introduced the scikit-learn Python package and performed the same anomaly detection, but with three-dimensional data (with two more fields: changePercent and changeOverTime) by using Python programming.

In this chapter, we will look at another advanced feature, which is known as Elasticsearch for Apache Hadoop (ES-Hadoop). The ES-Hadoop feature contains two major areas. The first area is the integration of Elasticsearch with Hadoop distributed computing environments, such as Apache Spark, Apache Storm, and Hive. The second area is the integration of Elasticsearch to use the Hadoop filesystem...