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Resource relationships affect systems operations in the following ways, depending on the resource operation modes:
During system startup, the region starts all the resources without parents first, then the children, level by level, until all resources are started.
Resources are started subject to the availability requirements defined in the resource availability maps.
During system shutdown, the region stops its resources in an order that is the reverse of the startup sequence. The resources are stopped level by level up the relationship tree.
The region starts resources in the same order, as when starting a system that contains only automated resources. However, when it encounters a resource in the MANUAL or IGNORED operation mode, the region does not start the resource or any of its children, even if the children are in the AUTOMATED operation mode. The region starts all other automated resources. Manual resources are started manually. Once a manual resource becomes active, the starting sequence continues with its children automatically.
Automated resources are started subject to the specified availability requirements.
The region stops the resources in the same order as when stopping a system that contains only automated resources. However, when it encounters a resource in the MANUAL or IGNORED operation mode, the region does not stop the resource or any of its parents, even if the parents are in the automated operation mode. The region stops all other automated resources. Manual resources are stopped manually. When a manual resource becomes inactive, the stopping sequence continues with its parents.
Note: The SHUTFORCE command lets you stop all of the resources defined in an active system image, irrespective of the operation mode. Before stopping the resources, the command sets all MANUAL or IGNORED operation modes to AUTOMATED operation modes.
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