I would be more interested in their search infra, specifically scaling that "highly optimized in-memory index". I'm guessing it's similar to LinkedIn's Zoie (h

I would be more interested in their search infra, specifically scaling that "highly optimized in-memory index". I'm guessing it's similar to LinkedIn's Zoie (http://code.google.com/p/zoie/ http://code.google.com/p/zoie/).