PrerequisiteYou must be granted the following permissions by your IAM administrator:
- ec2:DescribePlacementGroup: Allows you to see if a placement group exists and to get information about it.
- ec2:DeletePlacementGroup: Allows you to roll back if an issue occurs.
- ec2:CreatePlacementGroup: Allows you to create a placement group to migrate new instances.
You can migrate placement groups as an alternative to scaling instances up or down manually if you do not want to stop the instances.
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Stop the database on a single instance in the system.
# tpareset -x stop system
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Verify the database is stopped.
# psh pdestate -w
PDE state: DOWN/HARDSTOP -
Start the placement group migration.
# tdc-migrate-placement-group --instance_type <desired instance type>
where the desired instance type is m5.4xlarge, m5.12xlarge, or m5.24xlarge.The old system remains running. The original instance names have -migrated appended to them. -
SSH into the system to verify the new instances are working as expected.
After verifying the new system, you can stop or terminate the old instances.