Book Image

Scaling Big Data with Hadoop and Solr

By : Hrishikesh Vijay Karambelkar
Book Image

Scaling Big Data with Hadoop and Solr

By: Hrishikesh Vijay Karambelkar

Overview of this book

<p>As data grows exponentially day-by-day, extracting information becomes a tedious activity in itself. Technologies like Hadoop are trying to address some of the concerns, while Solr provides high-speed faceted search. Bringing these two technologies together is helping organizations resolve the problem of information extraction from Big Data by providing excellent distributed faceted search capabilities.</p> <p>Scaling Big Data with Hadoop and Solr is a step-by-step guide that helps you build high performance enterprise search engines while scaling data. Starting with the basics of Apache Hadoop and Solr, this book then dives into advanced topics of optimizing search with some interesting real-world use cases and sample Java code.</p> <p>Scaling Big Data with Hadoop and Solr starts by teaching you the basics of Big Data technologies including Hadoop and its ecosystem and Apache Solr. It explains the different approaches of scaling Big Data with Hadoop and Solr, with discussion regarding the applicability, benefits, and drawbacks of each approach. It then walks readers through how sharding and indexing can be performed on Big Data followed by the performance optimization of Big Data search. Finally, it covers some real-world use cases for Big Data scaling.</p> <p>With this book, you will learn everything you need to know to build a distributed enterprise search platform as well as how to optimize this search to a greater extent resulting in maximum utilization of available resources.</p>
Table of Contents (15 chapters)
Scaling Big Data with Hadoop and Solr
Credits
About the Author
About the Reviewer
www.PacktPub.com
Preface
Index

Optimizing the search schema


When Solr is used in the context of a specific requirement; for example, a log search for an enterprise application, it holds a specific schema, which can be defined in schema.xml and copied over to nodes. The schema plays a vital role in the performance of your Solr instance, because based on the schema, attributes are indexed.

Specifying the default search field

In schema.xml of Solr configuration, the system allows you to specify the <defaultSearchField> parameter. This is the parameter that controls when you search without an explicit field name in your query, which field to pick up for searching. This is an optional parameter, if this is not specified, for all of the queries that are not providing the field name, search will run them on all of the available fields in the schema. This will not only consume more CPU time, but overall slow down the search performance.

Configuring search schema fields

In custom schema, having more number of fields for indexing...