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Using Solr's Dismax Tie Parameter

This article is part of the DZone Solr-Lucene Zone, which is brought to you in collaboration with the Solr/Lucene Community. Visit the Solr-Lucene Zone for additional tutorials, videos, opinions, and other resources on this topic.

Most of the time in Solr's Dismax query parser we use parameters like qf, pf or mm forgetting about a very useful parameter which allows us to control how the lower scoring fields are treated – the tie parameter. In this article you'll learn how this parameter can be put to good use.

0 replies - 1535 views - 02/08/12 by Rafał Kuć in Articles

Document language identification

One of the features of the latest Solr version (3.5) is the ability to identify the language of the document during its indexation. In today's entry we will see how Apache Solr works together with Apache Tika to identify the language of the documents.

0 replies - 2033 views - 02/06/12 by Rafał Kuć in Articles

The Java 7 - Lucene Bug Controversy: The Story Behind the Story

Learn about the controversy that emerged in the early days of the Java 7 GA release because of the effect it had on Apache Lucene - from the perspective of Uwe...

1 replies - 4945 views - 02/03/12 by Mitchell Pronsc... in Videos

Do I have to look for maxBooleanClauses when using filters?

One of the configuration variables we can find in the solrconfig.xml file is maxBooleanClauses, which specifies the maximum number of boolean clauses that can be combined in a single query. The question is, do I have to worry about it when using filters in Solr? Find out.

0 replies - 1296 views - 02/02/12 by Rafał Kuć in Articles

Indexing Chinese in Solr

Recently, we had a project where we helped a client index a corpus of Chinese language documents in Solr. We have asked Dan Funk, a committer to Project Blacklight to provide a guest blog post for us on the details of how to approach indexing Chinese,...

0 replies - 2437 views - 01/30/12 by Jason Hull in Articles

Morphological Analysis and Named Entity Recognition in Lucene/Solr

This talk will show how the relevance of search results can be improved by using morphological analysis and named entity recognition. After briefly...

0 replies - 2435 views - 01/27/12 by Mitchell Pronsc... in Videos

Solr at Etsy

Search at Etsy poses significant challenges. Our marketplace is filled with millions of unique, short-lived items and people trying to find them over 10...

0 replies - 3468 views - 01/26/12 by Mitchell Pronsc... in Videos

Solr and Lucene Reference Guide updated for v3.5

The free Solr Reference Guide published by Lucid Imagination has been updated to 3.5 - the current release version of Solr and Lucene. The changes weren't major, but here are the key changes:

1 replies - 2597 views - 01/23/12 by Mitchell Pronsc... in News

Powered by Lucene: IBM Content Analytics with Enterprise Research

See and hear how IBM applies Lucence into their commercial software offerings. Hear about experience in development and advantages of this...

0 replies - 1898 views - 01/21/12 by Christopher Smith in Videos

Limitations of 'ToChildBlockJoinQuery' fixed in Lucene!

In my last post I described a known limitation of BlockJoinQuery: it joins in only one direction (from child to parent documents). This can be a problem because some applications need to join in reverse (from parent to child documents) instead.

0 replies - 1517 views - 01/18/12 by Michael Mccandless in Tips and Tricks

Jumping from MySQL to Cassandra: A Success Story

Today I’m gonna share with you my experience when I started with Apache Cassandra…One of the most complicated steps to learn any NoSql stuff, is to take away of your mind the normalization principles and those relational DB structures. Relational...

0 replies - 3510 views - 01/18/12 by Jose Alvarez Mu... in Articles

Solr at Virgin Money Giving

Virgin Money Giving is a UK-based not-for-profit business that was launched as a result of Virgin Money’s sponsorship of the London Marathon and raised...

0 replies - 1585 views - 01/17/12 by Mitchell Pronsc... in Videos

Options to Tune Document’s Relevance in Solr

Working at Lucid Imagination a customer once asked me about how they could modify the score of the documents in Solr in order to get most relevant results higher in the results list. While I was trying to respond the question I realized that there are too...

1 replies - 1482 views - 01/16/12 by Christopher Smith in Articles

Lessons Learned: Refactoring a Solr-Based API App

In this case study I'll discuss architectural lessons learned from refactoring an existing REST-API backed by Apache Solr. The initial goal of the...

0 replies - 1800 views - 01/15/12 by Mitchell Pronsc... in Videos

Configuring Mahout Clustering Jobs

For more than a decade internet search engines have helped users find documents they are looking for. However, what if users aren't looking for anything...

1 replies - 2052 views - 01/13/12 by Mitchell Pronsc... in Videos