Performing Hyper-V Replica Failover
Once replication is configured, the next step is to perform failovers. But before failing
over, it’s important to ensure the ongoing health of the replication. In Hyper-V
Manager, each virtual machine has a Replication tab as part of its high-level status.
This tab shows the mode of replication, the health of the replication, and the time of
last synchronization. This same information is available in Failover Cluster Manager
for the virtual machine, and you can view more-detailed health of the replication state
by using the Replication – View Replication Health action, as shown in Figure 8.6. The
replication health view shows the same basic overview information but also details of
the average and maximum size of the transferred data, the average latency, any errors,
and the number of replication cycles. It also shows pending replication data.
Figure 8.6 Viewing the health of replication
It may be confusing because there is a Replication State entry and a Replication
Health entry, but Replication State shows the current state of replication, and
Replication Health factors in events over a period of time, which helps identify
whether there has been a problem at some point in that evaluation time period. You
can find a full list of possible values for Replication State and Replication Health at
http://blogs.technet.com/b/virtualization/archive/2012/06/15/interpreting-