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Date	Description
April 4	SimpleDB Overview
April 11	TA Extra Office Hours
April 18	Indexing
April 25	Indexing and Operator Algorithms
May 2	Query optimization
May 9	Transactions: Concurrency Control
May 16	Transactions: Recovery
May 23	Transaction Recovery with Aries
May 30	Parallel processing
June 6	Distributed processing and Replication