Changing Bits

Another summer wraps up, another successful Google Summer of Code project finished in Apache Lucene! We had two projects this summer; h...

Google's entire index has been in RAM for at least 5 years now. Why not do the same with an Apache Lucene search index? RAM has beco...

As of 4.0 Lucene has switched to a new pluggable codec architecture, giving the application full control over the on-disk format of all inde...

The 4.0.0 alpha release of Lucene and Solr is finally out! This is a major release with lots of great changes. Here I briefly describe ...

Lucene Revolution 2012 is now done, and the talk Robert and I gave went well! We showed how we are using automata ( FSA s and FST s) to ma...

Lucene's TokenStream class produces the sequence of tokens to be indexed for a document's fields. The API is an iterator: you call...

I'm happy to announce that two Lucene Google Summer of Code projects were accepted for this summer! The first project ( LUCENE-3312 ...

In the past, Lucene recorded only the bare minimal aggregate index statistics necessary to support its hard-wired classic vector space scori...

The social crowd has proven to be powerful, if you can find some way to harness it: crowd-sourcing can perform tasks and solve collaborativ...

Many users don't appreciate the transactional semantics of Lucene's APIs and how this can be useful in search applications. For sta...

In my last post I described a known limitation of BlockJoinQuery : it joins in only one direction (from child to parent documents). This c...

Lucene's 3.4.0 release adds a new feature called index-time join (also sometimes called sub-documents, nested documents or parent/chi...