Working With System Image Definitions › Define a Resource to a System Image › Define the Activation Details › How Restart Control Affects Resource Restarts

How Restart Control Affects Resource Restarts

Conditions might arise when an automated resource becomes active momentarily only and then turns inactive, causing the region to restart the resource. If the condition persists, the region will continue to restart the resource every time the resource deviates from the ACTIVE state. To prevent this situation from continuing unchecked, you can use the restart control parameters to limit the number of times activation is retried.

The restart control parameters specify the maximum number of restarts that are permitted within a specified time period. The time period starts the first time the resource is activated.

If this retry limit is exceeded, the actual state of the resource is set to FAILED and the operation mode of the resource is set to MANUAL. No further activation is performed.

If the retry limit is not exceeded, the next activation that occurs outside the retry time period will reset the retry count and period.

Example: Effect of Activation Limits on Resource Restarts

The following illustration shows how different retry limits affect resource restarts. In the first example, the retry limit is exceeded and the resource status is set to FAILED and MANUAL. In the second example, the retry limit is never exceeded and the restarts will continue unchecked.

Important! For restarts to be limited, the retry time period must be long enough for the retry limit to be exceeded.

If no restarts are required, the retry time period will expire and the parameters will have no effect on resource operations.