Fault Monitor (5/02)

The following change was introduced in the Sun Cluster 3.0 5/02 update release and applies to this update and all subsequent updates to Sun Cluster 3.0 software.

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 off-loaded (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, off-loaded 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 off-loaded 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.