Lucene Search Essentials: Scorers, Collectors and Custom Queries by Mikhail Khludnev.
From the description:
My team is building next generation eCommerce search platform for major an online retailer with quite challenging business requirements. Turns out, default Lucene toolbox doesn’t ideally fit for those challenges. Thus, the team had to hack deep into Lucene core to achieve our goals. We accumulated quite a deep understanding of Lucene search internals and want to share our experience. We will start with an API overview, and then look at essential search algorithms and their implementations in Lucene. Finally, we will review a few cases of query customization, pitfalls and common performance problems.
Don’t be frightened of the slide count at 179!
Multiple slides are used with single illustrations to demonstrate small changes.
Having said that, this is a “close to the metal” type presentation.
Worth your time but read along carefully.
Don’t miss the extremely fine index on slide 18.
Follow http://www.lib.rochester.edu/index.cfm?PAGE=489 for images of pages that go with the index. This copy of Fasciculus Temporum dates from 1480.