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Apache Solr Search Patterns

You're reading from   Apache Solr Search Patterns Leverage the power of Apache Solr to power up your business by navigating your users to their data quickly and efficiently

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Product type Paperback
Published in Apr 2015
Publisher
ISBN-13 9781783981847
Length 316 pages
Edition 1st Edition
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Author (1):
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Jayant Kumar Jayant Kumar
Author Profile Icon Jayant Kumar
Jayant Kumar
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Table of Contents (12) Chapters Close

Preface 1. Solr Indexing Internals 2. Customizing the Solr Scoring Algorithm FREE CHAPTER 3. Solr Internals and Custom Queries 4. Solr for Big Data 5. Solr in E-commerce 6. Solr for Spatial Search 7. Using Solr in an Advertising System 8. AJAX Solr 9. SolrCloud 10. Text Tagging with Lucene FST Index

Migrating documents to another collection


Suppose we have a huge collection of over a billion documents and we get a requirement whereby we need to create a separate index with a particular set of documents, or we want to break our index into two parts on the basis of certain criteria. Migration of documents to another collection makes this possible. Effectively, we can specify a source and a destination collection in SolrCloud. On the basis of the routing criteria, certain documents will be copied from the source to the destination collection. We can specify the migration time as the forward.timeout parameter during which all write requests will be forwarded to the target collection. The target collection must not receive any writes while the migrate command is running. Otherwise, some writes may be lost.

Let us look at a practical scenario.

We currently have two collections—catcollection and mycollection. Now catcollection contains documents belonging to the categories books, currency, and...

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