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A new proximity query for Lucene, using automatons

The simplest Apache Lucene query, TermQuery, matches any document that contains the specified term, regardless of where the term occurs inside each document. Using BooleanQuery you ...
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Choosing a fast unique identifier (UUID) for Lucene

Most search applications using Apache Lucene assign a unique id, or primary key, to each indexed document. While Lucene itself does not require this (it could care less!), the application ...
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Testing Lucene’s index durability after crash or power loss

One of Lucene’s useful transactional features is index durability which ensures that, once you successfully call IndexWriter.commit, even if the OS or JVM crashes or power is ...
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Using Lucene’s search server to search Jira issues

You may remember my first blog post describing how the Lucene developers eat our own dog food by using a Lucene search application to find our Jira issues. That application has become ...
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Finding long tail suggestions using Lucene’s new FreeTextSuggester

Lucene’s suggest module offers a number of fun auto-suggest implementations to give a user live search suggestions as they type each character into a search box. For example, ...
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Geospatial (distance) faceting using Lucene’s dynamic range facets

There have been several recent, quiet improvements to Lucene that, taken together, have made it surprisingly simple to add geospatial distance faceting to any Lucene search application, ...
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Three exciting Lucene features in one day

Yesterday was a productive day: suddenly, there are three exciting new features coming to Lucene. Expressions module The first feature, committed yesterday, is the new expressions module. ...
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Screaming fast Lucene searches using C++ via JNI

At the end of the day, when Lucene executes a query, after the initial setup the true hot-spot is usually rather basic code that decodes sequential blocks of integer docIDs, term frequencies ...
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Transactional Lucene

Many users don’t appreciate the transactional semantics of Lucene’s APIs and how this can be useful in search applications. For starters, Lucene implements ACID properties:Atomicity: ...
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