Why are all nodes not listed in certain subsystems when running 'health subsystem show'?
Applies to
- Ontap 9
- FAS/AFF systems
Answer
- Some HM (health monitor) subsystems are running on all nodes in the cluster.
- Other HM subsystems only run on one node.
- This is because there are node-level HM processes and cluster-level HM processes.
- Cluster-level HM subsystems only run on one node (and may move around to another nodes, if necessary). Node-level HM processes run on each node in the cluster.
- As such, this is expected behavior.
Additional Information
- Example of Cluster-level HM subsystem:
Cluster::> health subsystem show
Subsystem: FHM-Switch
Health: ok
Initialization State: initialized
Number of Outstanding Alerts: 0
Number of Suppressed Alerts: 0
Node: cluster-02
Subsystem Refresh Interval: 1h
Subsystem: FHM-Bridge
Health: ok
Initialization State: initialized
Number of Outstanding Alerts: 0
Number of Suppressed Alerts: 0
Node: cluster-02
Subsystem Refresh Interval: 1h
- Example of node-level HM subsystem:
Subsystem: MetroCluster_Node
Health: ok
Initialization State: initialized
Number of Outstanding Alerts: 0
Number of Suppressed Alerts: 0
Node: cluster-01, cluster-02, cluster-03,
cluster-04, cluster-05, cluster-06,
cluster-09, cluster-10
Subsystem Refresh Interval: 15m, 15m, 15m, 15m, 15m, 15m, 15m, 15m