When debugging your queries, it is very valuable to know how all the queries are executed. Because of that, we decided to include the section on how query rewrite works in Elasticsearch, why it is used, and how to control it. If you have ever used queries, such as the prefix
query and the wildcard
query, basically any query that is said to be multiterm (a query that is built of multiple terms), you've used query rewriting even though you may not have known about it. Elasticsearch does rewrite for performance reasons. The rewrite process is about changing the original, expensive query into a set of queries that are far less expensive from an Apache Lucene point of view, thus speeding up the query execution.
Elasticsearch Server - Third Edition
By :
Elasticsearch Server - Third Edition
By:
Overview of this book
ElasticSearch is a very fast and scalable open source search engine, designed with distribution and cloud in mind, complete with all the goodies that Apache Lucene has to offer. ElasticSearch’s schema-free architecture allows developers to index and search unstructured content, making it perfectly suited for both small projects and large big data warehouses, even those with petabytes of unstructured data.
This book will guide you through the world of the most commonly used ElasticSearch server functionalities. You’ll start off by getting an understanding of the basics of ElasticSearch and its data indexing functionality. Next, you will see the querying capabilities of ElasticSearch, followed by a through explanation of scoring and search relevance. After this, you will explore the aggregation and data analysis capabilities of ElasticSearch and will learn how cluster administration and scaling can be used to boost your application performance. You’ll find out how to use the friendly REST APIs and how to tune ElasticSearch to make the most of it. By the end of this book, you will have be able to create amazing search solutions as per your project’s specifications.
Table of Contents (18 chapters)
Elasticsearch Server Third Edition
Credits
About the Authors
About the Reviewer
www.PacktPub.com
Preface
Free Chapter
Getting Started with Elasticsearch Cluster
Indexing Your Data
Searching Your Data
Extending Your Querying Knowledge
Extending Your Index Structure
Make Your Search Better
Aggregations for Data Analysis
Beyond Full-text Searching
Elasticsearch Cluster in Detail
Administrating Your Cluster
Scaling by Example
Index
Customer Reviews