Configuration Maps and Reconfiguration
The Configuration utility describes the complete Teradata Database system in the new configuration map area.
As the Teradata Database system grows and changes, use Configuration to revise the new configuration map to reflect the following types of changes to the Teradata Database system:
Use the configuration maps to perform these tasks:
The Teradata Database system contains these two configuration maps:
The new configuration map serves as input to the Reconfiguration utility.
Typically, Reconfiguration is used to alter the number of AMPs in a Teradata Database system. The new configuration map includes the status of each AMP in a Teradata Database system.
After Configuration builds a new configuration map, Reconfiguration redefines the Teradata Database system configuration according to the new map. Reconfiguration copies the new configuration map to the current configuration map on each node.
During reconfiguration, data is redistributed among AMPs if AMPs were added or deleted, if cluster assignments were changed, or if hash bucket sizes are changed. Redistribution causes hash bucket assignments to be recalculated. These assignments describe the AMPs responsible for primary data and the AMPs responsible for fallback data.
Hash bucket arrays contain hash bucket assignments for each AMP:
Information that defines the new configuration is used during reconfiguration.