Greate and very easy to use functionality. Thanks to author.
* Clear, well-written and comprehensive documentation.
* Clear API, familiar to Lucene users
* Very easy to use, shallow learning curve: comes with a sample app that should allow almost anyone to get a search engine running in under 20 minutes
* Relatively fast: certainly faster than any Perl search engine I have tested
If for some reason Lucene is not an option, KinoSearch is a fair fall-back.