HACMP/RG

IBM 红皮书关于rg行为的一段：
Cascading: Initially designed for resource groups to have an affinity for a
particular node - will start on this node by preference, and fallback to it when it
becomes available after a failure. Behavior could be further controlled by a
combination of three attributes:
– Inactive takeover (ITO): The resource group would be brought online by
nodes other than the priority node in the resource group’s node list.
– Cascading without fallback (CWOF): Whether the resource group would
cascade over to a higher priority node when it integrated into the cluster
– Dynamic Node Priority (DNP): Same as the attribute for customer
resource groups.
读不懂，请DX指点一下