The cluster manager is responsible for which function?
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Sendind and receiving heart beat packets
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management of starting,stoping and relocating packages
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monitoring network connectivity
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management and coordination of node membership
The cluster manager in Serviceguard handles node membership - tracking which nodes join, leave, or fail in the cluster. It coordinates membership changes during reconfiguration. Heartbeat monitoring is typically handled by separate cluster communication protocols, not the membership manager itself.
In cluster technologies (e.g., HP Serviceguard, Linux heartbeat/Pacemaker), the cluster manager's core job is managing and coordinating node membership — tracking which nodes are currently active members of the cluster, detecting when nodes join or leave, and maintaining a consistent view of cluster membership so failover decisions can be made correctly. Sending/receiving heartbeat packets is a mechanism used to detect node health (a building block, not the manager's defining function), starting/stopping/relocating packages is the job of the package/application manager layered on top, and monitoring network connectivity is handled by network monitor sub-components. The membership-coordination role is what's uniquely attributed to the cluster manager itself.