Dell EMC Metro node 7.0.1 Product Guide

Metro node cluster failure

In the event of a full metro node cluster outage at one site:

• Metro node Witness guides the surviving cluster to continue.
• VMware at the surviving cluster is unaffected.

• VMware restarts the virtual machines at the site where the outage occurred, redirecting I/O to the surviving cluster.

  VMware can restart because the second metro node cluster has continued I/O without interruption.

Inter-cluster link failure - non-preferred site

If an inter-cluster link outage occurs, the preferred cluster continues, while the non-preferred cluster suspends. If a virtual machine is located at the preferred cluster, there is no interruption of service. If a virtual machine is located at the non-preferred cluster, the storage associated with the virtual machine is suspended. In such a scenario, most guest operating systems will fail. The virtual machine will be restarted at the preferred cluster after a short disruption.

If an inter-cluster link outage occurs:

• Metro node Witness guides the preferred cluster to continue.
• VMware at the preferred cluster is unaffected.
• VMware restarts the virtual machines at the non-preferred (suspended) cluster, redirecting I/O to the preferred (uninterrupted) cluster.

VMware can restart because the second metro node cluster has continued I/O without interruption.