16.20 - Overview - Teradata Database - Teradata Vantage NewSQL Engine

Teradata Vantage™ - Teradata® Virtual Storage

Product
Teradata Database
Teradata Vantage NewSQL Engine
Release Number
16.20
Published
March 2019
Content Type
Configuration
Publication ID
B035-1179-162K
Language
English (United States)
Last Update
2019-05-02

Normally, Teradata VS monitors the frequency of data access at the cylinder level, and periodically migrates cylinders that store more frequently accessed (hotter) data to faster storage media, and less frequently accessed (colder) data to slower storage media. The monitoring process requires some time to gauge the frequency of access, before data can be migrated to appropriate media.

The temperature that is assigned to new data, before it has been migrated for the first time, is normally determined by defaults set in DBS Control. This section discusses techniques for explicitly specifying data temperatures, which can precede or override the normal monitoring and migration process.

For more information on the benefits and considerations of specifying and changing data temperatures, see Introduction to Teradata Virtual Storage.