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You're reading from Advanced Elasticsearch 7.0 A practical guide to designing, indexing, and querying advanced distributed search engines

Product type Paperback

Published in Aug 2019

Publisher Packt

ISBN-13 9781789957754

Length 560 pages

Edition 1st Edition

Languages

Java

Tools

Elasticsearch

Concepts

Enterprise Search

Author (1):

Wai Tak Wong

View More author details

Table of Contents (25) Chapters

Preface

1. Section 1: Fundamentals and Core APIs FREE CHAPTER

2. Overview of Elasticsearch 7

3. Index APIs

4. Document APIs

5. Mapping APIs

6. Anatomy of an Analyzer

7. Search APIs

8. Section 2: Data Modeling, Aggregations Framework, Pipeline, and Data Analytics

9. Modeling Your Data in the Real World

10. Aggregation Frameworks

11. Preprocessing Documents in Ingest Pipelines

12. Using Elasticsearch for Exploratory Data Analysis

13. Section 3: Programming with the Elasticsearch Client

14. Elasticsearch from Java Programming

15. Elasticsearch from Python Programming

16. Section 4: Elastic Stack

17. Using Kibana, Logstash, and Beats

18. Working with Elasticsearch SQL

19. Working with Elasticsearch Analysis Plugins

20. Section 5: Advanced Features

21. Machine Learning with Elasticsearch

22. Spark and Elasticsearch for Real-Time Analytics

23. Building Analytics RESTful Services

24. Other Books You May Enjoy

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Other search-related APIs

Elasticsearch supports a few search-related APIs to provide information to troubleshoot search issues. It can help you in preparing the complex search query to obtain more precise search results.

The _explain API

Similar to the explain parameter in the request body search, this _explain API tells you how to calculate the score of matching for a particular document. It provides you with useful feedback when looking for related issues and finding the reason why a given document can be found. The following screenshot provides an explanation as to why the GgOJ7msB3gfI-VGlT4dA document identifier satisfies the query:

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Authors (1)

Wong

Wai Tak Wong is a faculty member in the Department of Computer Science at Kean University, NJ, USA. He has more than 15 years professional experience in cloud software design and development. His PhD in computer science was obtained at NJIT, NJ, USA. Wai Tak has served as an associate professor in the Information Management Department of Chung Hua University, Taiwan. A co-founder of Shanghai Shellshellfish Information Technology, Wai Tak acted as the Chief Scientist of the R&D team, and he has published more than a dozen algorithms in prestigious journals and conferences. Wai Tak began his search and analytics technology career with Elasticsearch in the real estate market and later applied this to data management and FinTech data services.

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