Every node is uniquely identified by:
a cluster unique name
a cluster unique location code
a cluster unique shared memory timestamp
The default node name is set to the local host name. The default node name can be changed during node installation. This allows multiple TIBCO BusinessEvents® Extreme nodes to run on the same machine.
The location code is automatically derived from the node name using a hashing algorithm.
The location code is a numeric identifier that is used to determine the actual network location of the master node for an object. The location code is stored with each Managed Object. The initial value of the location code for an object is the location code of the node on which the object was created.
Highly available objects can migrate to other nodes as part of failover, or to support load balancing. When object migration occurs the location code associated with all of the migrated objects is updated to use the location code of the node to which they were migrated. This update occurs on all nodes on which the objects exist. After the completion of an object migration, the new master node for the object is the new node, which may be different than the node on which the object was created.
The shared memory timestamp is assigned when the shared memory is first created for a node. This occurs the first time a node is started following an installation. The shared memory timestamp is a component of the opaque distributed reference. It ensures that the distributed reference is globally unique.