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

Avoiding filter caching


Imagine that some of the filters you use in your queries are not good candidates for caching. You may wonder why, for example, those filters have a date and time with seconds or are spatial filters scattered all over the world. Such filters are quite unique and when added to the cache, their entries can't be reused much. Thus they are more or less useless. Caching such filters is a waste of memory and CPU cycles. Is there something you can do to avoid filter queries caching? Yes, there is a way and this recipe will show you how to do it.

How to do it...

Let's assume we have the following query being used to get the information we need:

q=solr+cookbook&fq=category:books&fq=date:2012-06-12T13:22:12Z

The filter query we don't want to cache is the one filtering our documents on the basis of the date field. Of course, we still want the filtering to be done. In order to turn off caching, we need to add {!cache=false} to our filter with the date field, so that our query...