Scale Out or In | Teradata Vantage on AWS (DIY) - 2.2 - Scaling Vantage Out or In - Teradata Vantage on AWS

Teradata Vantageā„¢ on AWS (DIY) Installation and Administration Guide

Product
Teradata Vantage on AWS
Release Number
2.2
Release Date
May 2021
Content Type
Administration
Configuration
Installation
Publication ID
B035-2800-041K
Language
English (United States)

[Base, Advanced, and Enterprise tiers only] You can add or remove instances from an existing system. Adding instances is referred to as scale out. Removing instances is referred to as scale in. Scale out and scale in supports only EBS data storage. A system can always be scaled in after it is scaled out.

Scale out does the following:
  • Increases the performance of the system by adding more CPU and memory, and increases the storage bandwidth by decreasing the data volumes managed per node.
  • Increases the node count by provisioning additional instances and other resources causing an increase in infrastructure and software costs.
  • Consumes additional subnet space. The subnet must have enough IP addresses for the new instances being added to the system.
  • Migrates EBS data volumes from existing instances to new instances.
Scale in does the following:
  • Decreases the performance of the system by removing CPU and memory, and decreases the storage bandwidth by increasing the data volumes managed per node.
  • Decreases the node count by terminating instances that are no longer needed and associated resources causing a decrease in infrastructure and software costs.
  • Migrates EBS data volumes from the instances that are removed to the remaining instances.

The database capacity and AMP total count does not change. When scaling out and scaling in, the number of AMPs is redistributed as evenly as possible across the instances.

If either scale out or scale in cannot complete successfully, the process rolls back the operation automatically and restores the original configuration. If rollback fails, contact Teradata Services.
Amazon ECS Auto Scaling is not supported. Maintenance and support does not include resolution for problems that result from using Auto Scaling.
To scale out or scale in, see the following instructions:
Action Instructions
To scale out at deployment
To scale in at deployment You cannot scale in at deployment, only after deployment.
To scale out after deployment Scaling Out a System
To scale in after deployment Scaling In a System