Book Image

Apache Solr 4 Cookbook

By : Rafał Kuć
Book Image

Apache Solr 4 Cookbook

By: Rafał Kuć

Overview of this book

<p>Apache Solr is a blazing fast, scalable, open source Enterprise search server built upon Apache Lucene. Solr is wildly popular because it supports complex search criteria, faceting, result highlighting, query-completion, query spell-checking, and relevancy tuning, amongst other numerous features.<br /><br />"Apache Solr 4 Cookbook" will show you how to get the most out of your search engine. Full of practical recipes and examples, this book will show you how to set up Apache Solr, tune and benchmark performance as well as index and analyze your data to provide better, more precise, and useful search data.<br /><br />"Apache Solr 4 Cookbook" will make your search better, more accurate and faster with practical recipes on essential topics such as SolrCloud, querying data, search faceting, text and data analysis, and cache configuration.<br /><br />With numerous practical chapters centered on important Solr techniques and methods, Apache Solr 4 Cookbook is an essential resource for developers who wish to take their knowledge and skills further. Thoroughly updated and improved, this Cookbook also covers the changes in Apache Solr 4 including the awesome capabilities of SolrCloud.</p>
Table of Contents (18 chapters)
Apache Solr 4 Cookbook
Credits
About the Author
Acknowledgement
About the Reviewers
www.PacktPub.com
Preface
Index

Improving faceting performance for low cardinality fields


Let's assume that our data which we use to calculate faceting can be considered to have low distinct values. For example, we have an e-commerce shop with millions of products – clothes. Each document in our index, apart from name and price, is also described by additional information – target size. So, we have values such as XS, S, M, L, XL, and XXL (that is, six distinct values), and each document can only be described with a single value. In addition to this, we run field faceting on that information and it doesn't work fast by default. This recipe will show you how to change that.

How to do it...

The following steps will explain how we can improve faceting performance for low cardinality fields:

  1. Let's begin with the following index structure (add the following entries to your schema.xml fields section):

    <field name="id " type="string" indexed="true" 
      stored="true" required="true" />
    <field name="name " type="text " indexed...