Affected Roles: System Owner • System Administrator
Related DW Spectrum VMS Apps: DW Spectrum Desktop
What is Automatic Camera Failover?
Automatic Camera Failover is a feature in DW Spectrum which allows System Servers to automatically recover when a power or networking failure occurs on a Server. Automatic Camera Failover can be enabled on individual Servers. When enabled Failover tells the server to grab cameras from any failed Server in the System.
A single Server can handle a maximum of 128 cameras. So, for example, if a Server is actively recording 64 cameras it can act as a Failover Server for up to 64 additional cameras from other Servers in the System.
Failover takes approximately 1 minute in the instance of a network or power failure.
Failover Design considerations
DW Spectrum’s server-hive architecture is flexible enough to implement Failover in a variety of methods. When designing and implementing a DW Spectrum with Failover some careful consideration should be given to the systems design. A DW Spectrum with Failover can be designed using the Standby Method or the Overhead Method.
So assume an application has 140 cameras of relatively equal resolution.
Standby Method - 2 servers are in production mode each recording 70 cameras and a 3rd server is merged into the system with no cameras on it. In this case if any of the 2 servers goes offline the 3rd server can take its place.
Overhead Method - 3 servers are in production mode each recording 47 cameras in merged environment. In this case if any one of the 3 servers goes offline the overhead capacity (in processor power and storage) of the other 2 servers can grab the failed servers cameras and continue to record.
To Enable Automatic Camera Failover on a Server:
To Setup Failover Priority: