Open-source collaboration, or how we finally added merge-on-refresh to Apache Lucene

The open-source software movement is a clearly a powerful phenomenon. A diverse (in time, geography, interests, gender (hmm not really,…

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Apache Lucene performance on 128-core AMD Ryzen Threadripper 3990X

Almost a decade ago, I started running Lucene’s nightly benchmarks, and have been trying with mixed success to keep them…

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Concurrent query execution in Apache Lucene

Apache Lucene is a wonderfully concurrent pure Java search engine, easily able to saturate the available CPU or IO resources…

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Lucene’s near-real-time segment index replication

[TL;DR: Apache Lucene 6.0 quietly introduced a powerful new feature called near-real-time (NRT) segment replication, for efficiently and reliably replicating…

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Lucene gets concurrent deletes and updates!

Long ago, Lucene could only use a single thread to write new segments to disk. The actual indexing of documents,…

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Apache Lucene 7.0 Is Coming Soon!

The Apache Lucene project will likely release its next major release, 7.0, in a few months! Remember that Lucene developers generally try…

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Jirasearch 2.0 dog food: using Lucene to find our Jira issues

A few years ago I first built and released Jirasearch as a fun dog-food test case for the thin-wrapper Lucene server, to…

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Apache Lucene 5.0.0 is coming!

At long last, after a strong series of 4.x feature releases, most recently 4.10.2, we are finally working towards another…

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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…

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