Pacemaker is a cluster resource manager, that is, a logic responsible for a life-cycle of deployed software — indirectly perhaps even whole systems or their interconnections — under its control within a set of computers (a.k.a. nodes) and driven by prescribed rules.
CIB - Cluster Information Base
CRMd - Cluster Resource Management daemon
LRMd - Local Resource Management daemon
PEngine - Policy Engine
STONITHd - Fencing daemon
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