I've used Sphinx in one of the PHP/MySQL projects, and its much faster than any other (free/open) data indexing platform I've used. Althought configuring Sphinx

I've used Sphinx in one of the PHP/MySQL projects, and its much faster than any other (free/open) data indexing platform I've used. Althought configuring Sphinx and getting it to run takes a bit of an effort, but its worth it.