Book Image

Mastering Apache Solr 7.x

By : Sandeep Nair, Chintan Mehta, Dharmesh Vasoya
Book Image

Mastering Apache Solr 7.x

By: Sandeep Nair, Chintan Mehta, Dharmesh Vasoya

Overview of this book

Apache Solr is the only standalone enterprise search server with a REST-like application interface. providing highly scalable, distributed search and index replication for many of the world's largest internet sites. To begin with, you would be introduced to how you perform full text search, multiple filter search, perform dynamic clustering and so on helping you to brush up the basics of Apache Solr. You will also explore the new features and advanced options released in Apache Solr 7.x which will get you numerous performance aspects and making data investigation simpler, easier and powerful. You will learn to build complex queries, extensive filters and how are they compiled in your system to bring relevance in your search tools. You will learn to carry out Solr scoring, elements affecting the document score and how you can optimize or tune the score for the application at hand. You will learn to extract features of documents, writing complex queries in re-ranking the documents. You will also learn advanced options helping you to know what content is indexed and how the extracted content is indexed. Throughout the book, you would go through complex problems with solutions along with varied approaches to tackle your business needs. By the end of this book, you will gain advanced proficiency to build out-of-box smart search solutions for your enterprise demands.
Table of Contents (14 chapters)
Title Page
Packt Upsell
Contributors
Preface
Index

Spellchecking


We have seen that Solr provides magical support for searching. Solr provides a strong index building mechanism, unifiable search configurations, and providing interesting and expected formatted results by executing various transformation steps on the query output. Spellchecking is an advantageous feature provided by Solr for those who make mistakes while typing a query or may enter an incorrect or inappropriate input. Sometimes, we have this experience while searching on Google. If we enter sokcer, then Google provides a hint: Did you mean: soccer? Or sometimes, typing socer will directly show results for soccer rather than displaying any hints.

Likewise, there are some scenarios where we need to be careful about the input word:

  • If a user enters input search terms with incorrect spelling and there is no matching document available, we use the Solr spellcheck feature, displaying a message that searching for soccer instead of socer will give the user a hassle-free experience of...