Biographical Sketch: David Zhang is a DB2 for z/OS performance specialist. He has been involved in the new function design and performance evaluation of DB2 for z/OS 9, 10, and VNext, specifically in the areas of bi-temporal support, OmniFind Search Server, DB2 security (trusted context, row permission/column mask). For the last 5 years, he has been providing performance support to large banking, retail, and insurance customers on their implementations of IBM InfoSphere Master Data Management solutions.