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Teradata Hot Standby Node Explained

By DWH Pro Admin

December 6, 2019


A hot standby node is a member of a group of nodes (clique), and no virtual processes are running on it (AMPs, Parsing Engines).

The hot standby node waits for its mission, which occurs when a node crashes out of its clique.

Then all the AMPs of the crashed node are immediately migrated to the hot standby node. This happens practically without any loss of performance:

Teradata Hot Standby Node Explained 1
Node crashes, migration of AMPs takes place

The ingenious thing about the design is the following: As soon as the crashed node is online again, it becomes the new hot standby node:

Teradata Hot Standby Node Explained 2
Recovered Node becomes the new HSN
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DWH Pro Admin

Roland Wenzlofsky is an experienced freelance Teradata Consultant & Performance Trainer. Born in Austria's capital Vienna, he is building and tuning some of the largest Teradata Data Warehouses in the European financial and telecommunication sectors for more than 20 years. He has played all the roles of developer, designer, business analyst, and project manager. Therefore, he knows like no other the problems and obstacles that make many data warehouse projects fail and all the tricks and tips that will help you succeed.

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