Stop, Start, or Delete a Presto Cluster

Danger Zone

• Stop, restart, or delete an Ahana-managed Presto cluster in the Danger Zone for the cluster.

• The Danger Zone contains actions that cause either temporary unavailability or permanent unavailability of an Ahana-managed Presto cluster.

• Any active query on the Presto cluster that does not complete in the Presto cluster's Query Termination Grace Period fails.

In the Ahana SaaS Console, select the Clusters tab, select the Manage button for the Presto cluster, then select the Danger Zone tab.

Stop Cluster

Stops the Presto cluster. A stopped cluster is available in Inactive Clusters on the View Presto Clusters page of the Ahana SaaS Console. All Ahana metadata and Ahana-managed catalog data in the Hive Metastore will be maintained and available on cluster start. This is useful when no usage is planned for a prolonged period of time.

1. In Danger Zone, select Stop Cluster.
2. In the confirmation, select Stop Cluster or Cancel.

Restart Cluster

Stops, then restarts the Presto cluster. Restarting moves the cluster to Pending Clusters on the View Presto Clusters page of the Ahana SaaS Console. The Presto cluster is unusable until it is available in the Active Clusters on the View Presto Clusters page of the Ahana SaaS Console. This is useful when the cluster is slowing down due to Java Garbage Collection challenges.

1. In Danger Zone, select Restart Cluster.
2. In the confirmation, select Restart Cluster or Cancel.

Delete Cluster

Deletes the Presto cluster and all Ahana metadata and Ahana-managed catalog data in the Hive Metastore.

1. In Danger Zone, select Delete Cluster.
2. In the confirmation, select an S3 bucket's checkbox to delete it with the Presto cluster.
3. In the confirmation, select Delete Cluster or Cancel.

tip

Amazon S3 buckets that are not deleted remain available in the Amazon S3 console, and can also be managed using the Ahana SaaS Console. See Ahana-managed S3 buckets.