Changing Bits

Almost a decade ago, I started running Lucene's nightly benchmarks, and have been trying with mixed success to keep them running every night, through the numerous amazing changes relentlessly developed by the passionate Lucene community. The benchmarks...

Apache Lucene is a wonderfully concurrent pure Java search engine, easily able to saturate the available CPU or IO resources on your server, if you ask it to. The concurrency model for a "typical" Lucene application is one thread per query at search...

[TL;DR: Apache Lucene 6.0 quietly introduced a powerful new feature called near-real-time (NRT) segment replication, for efficiently and reliably replicating indices from one server to another, and taking advantage of ever faster and cheaper local area...

Long ago, Lucene could only use a single thread to write new segments to disk. The actual indexing of documents, which is the costly process of inverting incoming documents into in-memory segment data structures, could run with multiple threads, but...