Datomic Documentation
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Turning Off Unused Compute Resources

While you can delete a compute stack at any time without loss of data, it is often useful to instead temporarily turn down unused compute capacity in a Datomic system. This is achieved by setting the scaling capacity targets for your compute group's auto-scaling group to 0.

Adjusting the ASG

CloudFormation

  • Go to CloudFormation.
  • Select the stack that you want to adjust the ASG on.
  • Click "Stack actions".
  • Click "Update".
  • Select "Use current template".
  • Click "Next".
  • Make your changes in the "Auto scaling configuration" section.
    • Ensure that the other settings match your desired stack configuration.
    • "Minimum number of instances during update" should always be 1 fewer than "Maximum instances".
  • Click "Next".
  • Acknowledge any capabilities listed.
  • Click "Update stack".

AWS Console (Legacy)

Select your stack (query group or primary compute group) in the Auto Scaling Group Console and click the "Edit" button:

editASG.png

In the dialog box that appears, set the Desired Capacity, Min, and Max to 0 and click "Save".

The ASG will terminate all nodes of that compute or query group without removing any of the other system resources. When you wish to re-activate your capacity, edit the same ASG and set the scaling capacity targets back to their original values.

Legacy

CLI Tools - Solo Topology (Legacy)

This section only applies to Datomic 781-9041 and lower.

The datomic solo CLI Tool command can be used to set the ASG to 0 or 1 for solo topology systems.