July 2010
Intermediate to advanced
448 pages
12h 22m
English
Content preview from Physical Database Design
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328 CHAPTER 14 Physical Design for Decision Support, Warehousing, and OLAP
nology using commodity components. The Netezza approach is based on massive I/O
parallelism, and one of their claims is that the technique obviates the need for index and
materialized view design. After all, do you need indexes when you can scan more than a
Terabyte per minute? On the flip side, Netezza has no caching, no indexing. Every data
request requires access to disk. The strategy is best suited to query processing needs, and
may not be ideal for active data warehousing, a current trend in data warehousing where
data warehouses are becoming increasingly near real time. ...
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