Administrator Guide

VMware vSphere and Live Volume
61 Dell EMC SC Series: Synchronous Replication and Live Volume | CML1064
8.11.6 Tiebreaker service link failure
Similar to the previous example, if either SC Series array loses network connectivity to the tiebreaker service
on the DSM server, both arrays will continue to service I/O requests but no automatic failover can occur
during this time.
Tiebreaker link failure
8.12 Detailed failure scenarios
The following table outlines tested design and component failure scenarios with Live Volume automatic
failover enabled with vSphere HA.
Event scenario
Live Volume behavior
vSphere HA behavior
Uniform: Complete site outage
takes down primary Live
Volumes
Primary Live Volumes
automatically recovered at remote
site
vSphere HA restarts impacted VMs
at remote site
Uniform: Complete site outage
takes down secondary Live
Volumes
Primary Live Volumes remain
available at remote site
vSphere HA restarts impacted VMs
at remote site
Non-uniform: Complete site
outage takes down primary Live
Volumes
Primary Live Volumes
automatically recovered at remote
site
vSphere HA restarts impacted VMs
at remote site
Non-uniform: Complete site
outage takes down secondary
Live Volumes
Primary Live Volumes remain
available at remote site
vSphere HA restarts impacted VMs
at remote site
Uniform: SC Series controller-
pair outage takes down primary
Live Volumes
Primary Live Volumes
automatically recovered at remote
site
None – VMs remain running at both
sites
Uniform: SC Series controller-
pair outage takes down
secondary Live Volumes
Primary Live Volumes remain
available at remote site
None – VMs remain running at both
sites