Hot buzzword — multidimensional partitioning
Teradata finally announced multidimensional range partitioning in Version 12, not that they kept their plans in that regard a big secret. DATAllegro has also shipped multidimensional partitioning to at least one customer. Other vendors — well, I’ll stop there, given my ongoing atttitude problems about vendors’ self-defeating NDAs.
Whether or not multidimensional partitioning is a big improvement over single-dimensional will of course depend a great deal on the details of a particular database. Teradata used a figure of 30% performance improvement, but that’s surely just an example. Certainly in some extreme cases one could have a rather large reduction in the amount of data retrieved, and correspondingly a many-times-X improvement in the performance of certain important queries.
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Technorati Tags: Teradata, range partitioning, data warehouse
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