The failover client periodically requests information from the source and target. Depending on the type of information, the request may be a machine-specific request, like obtaining the Time to Fail status from a target, or may be a general request, like determining which machines are running Double-Take Availability.
The rate at which these requests are made can be modified through the Failover Control Center refresh rate dialog box. Select Settings, Refresh Rate. The default update interval is one second. A lower refresh rate value updates the information in the Failover Control Center window's Monitored Machines tree more often, but also generates more network traffic and higher utilization on the client and target machines. A higher refresh rate value updates the information less frequently, but minimizes the network traffic.