Changing Bits

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...

In the past, search indices were usually very static: you built them once, called optimize at the end and shipped them off, and didn'...

Last time , I described the useful SearcherManager class, coming in the next (3.5.0) Lucene release, to periodically reopen your IndexSearc...

To get a sense of the accuracy and performance of Google's Compact Language Detector , I ran some tests against two other packages: ...

I've made some small improvements after my quick initial port of Google's Compact Language Detection Library , starting with some ...

Google's Chrome browser has a useful translate feature, where it detects the language of the page you've visited and if it differs...

Modern computers have wonderful hardware concurrency, within and across CPU cores, RAM and IO resources, which means your typical server-bas...

A few days ago I committed the new MemoryCodec to Lucene's trunk (to be 4.0). This codec indexes all terms and postings into a compact...

I looked into the curious issue I described in my last post , where the NRT reopen delays can become "spikey" (take longer) during...

Lucene's near-real-time (NRT) search feature, available since 2.9, enables an application to make index changes visible to a new searche...

It turns out, the Jira issue tracking system , which we make heavy use of here at Apache , uses Lucene under the hood for searching and bro...