Fault Monitor

The Fault Monitor probe for RGOffload resource is used to keep resource groups specified in the rg_to_offload extension property offline on the node mastering the critical resource. During each probe cycle, Fault Monitor verifies that resource groups to be offloaded (offload-rg) are offline on the node mastering the critical resource. If the offload-rg is online on the node mastering the critical resource, the Fault Monitor attempts to start offload-rg on nodes other than the node mastering the critical resource, thereby bringing offload-rg offline on the node mastering the critical resource.

Because desired_primaries for offload-rg is set to 0, offloaded resource groups are not restarted on nodes that become available later. Therefore, the RGOffload Fault Monitor attempts to start up offload-rg on as many primaries as possible, until maximum_primaries limit is reached, while keeping offload-rg offline on the node mastering the critical resource.

RGOffload attempts to start up all offloaded resource groups unless they are in the MAINTENANCE or UNMANAGED state. To place a resource group in an UNMANAGED state, use the scswitch command.

# scswitch -u -g resourcegroup

The Fault Monitor probe cycle is invoked after every Thorough_probe_interval.