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  Data Warehousing CPS216 Notes 13  Shivnath Babu  2 Warehousing  Growing industry: $8 billion way back in 1998  Range from desktop to huge:  Walmart: 900-CPU, 2,700 disk, 23TB Teradata system  Lots of buzzwords, hype  slice & dice, rollup, MOLAP, pivot, ...  3 Outline  What is a data warehouse?  Why a warehouse?  Models & operations  Implementing a warehouse  Future directions  4 What is a Warehouse?  Collection of diverse data  subject oriented  aimed at executive, decision maker  often a copy of operational data  with value-added data (e.g., summaries, history)  integrated  time-varying  non-volatile more
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