The Cluster Runtime Environment

The CRE comprises two sets of daemons--the master daemons and the nodal daemons.

The master daemons consist of the tm.rdb, tm.mpmd, and tm.watchd. They run on one node exclusively, which is called the master node. There are two nodal daemons, tm.omd and tm.spmd. They run on all the nodes.

These two sets of daemons work cooperatively to maintain the state of the cluster and manage program execution. See "Overview of the CRE Daemons" for individual descriptions of the CRE daemons.