Administrator Guide

98 XC Series Data Protection Management Console Administrator’s Guide | A02
After 30 minutes, if the heartbeat check has failed for all retries, DPMC sends an additional notification every
30 minutes that the Data Domain is disconnected.
12.1.3 Prism Central Heartbeat
DPMC constantly monitors the Prism Central Heartbeat and notifies you if the application can no longer
communicate with the Prism Central instance.
If the heartbeat check fails, DPMC tries reconnecting, every minute for 5 minutes, to ensure the connection
can be established. If no connection was established after the initial 5 minutes, DPMC begins generating
alerts and will not allow changes to any cluster. You are notified with a critical alert that Prism Central is
disconnected. It also displays the timestamp when the alert is generated.
DPMC attempts to re-establish connectivity every minute. DPMC presents the following conditions:
• Keeps all the last known data for VMs and clusters in the tables.
• Does not allow tasks to be initiated from the VM or cluster pages (on-demand backup, manage
clusters and others).
• Displays the Attention icon next to the Cluster Name entry in the cluster table for every cluster until
Prism Central heartbeat is restored. Hovering over the icon displays the following message: Prism
Central is not reachable.
• DPMC displays the Attention icon next to the Cluster Name entry in the VM table for every VM until
Prism Central heartbeat is restored. Hovering over the icon displays the following message: Prism
Central is not reachable.
After 30 minutes, if the heartbeat check has failed for all retries, DPMC sends an additional notification every
30 minutes that Prism Central is still disconnected.
12.1.4 Nutanix Cluster Heartbeat
DPMC responds when Nutanix clusters are joined to the Prism Central instance. If a cluster is joined and is in
an unreachable state, DPMC suspends the user initiated actions for that cluster only.
If no connection was established after the initial 5 minutes, DPMC notifies you that the cluster is
disconnected. DPMC attempts to re-establish connectivity every minute. DPMC presents the following
conditions:
• Keeps all last known data for VMs and clusters in the tables.
• Does not allow you to initiate any tasks from the cluster page on the impacted cluster.
• Does not allow you to initiate any tasks from the VM page for the VMs on the impacted cluster.
• Displays the Attention icon next to the Cluster Name entry in the cluster table for the impacted cluster
until availability is restored. Hovering over the icon displays the following message: This cluster is not
reachable.
• Displays the Attention icon next to the Cluster Name entry in the VM table for every VM on the
impacted cluster until availability is restored. Hovering over the icon displays the following message:
This cluster is not reachable.
After 30 minutes, if the heartbeat check has failed for all retries, DPMC sends an additional notification every
30 minutes that the cluster is still disconnected.