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Teradata Aster Data by John Nolan, Tom Coffing

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Chapter 4 - Four Options for Aster Data Table Design

“Speak in a moment of anger and you’ll deliver the greatest speech you’ll ever regret.”

– Anonymous

There are Four Options to Aster Table Design

1. Straight up Distribute by Hash:

All of your fact tables will use the Distribute by Hash design of simply having a single column serving as the Distribution Key. These tables will distribute the rows of the table among the vworkers with a consistent and straightforward Hash Formula.

2. Straight up Distribute by Replication:

Most of your dimension tables will use the Distribute by Replication design which makes a complete copy of all rows in the table and distributes the entire copy across all vworkers. Each vworker has an exact copy of the entire ...

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