Redundancy
Management Servers: each Management Server is duplicated, and so has a back-up Management Server. Between the primary Management Sever and the alternate Management Server, a heartbeart pings back and forth every two seconds. If a heartbeat does not return within 10 seconds, the receiving Management Server marks the other as 'down'. If the primary Management Server goes down, the back-up Management Server swiftly takes control of the primary's Track Engines and Radar, ensuring no break or failure in the system.
Track Engines: Track Engines back-up one another. Under Topology, you can configure which Track Engines back up which. In this example, the Track Engines back-up one another cyclically, which is probably the most logical back up configuration. If one Track Engine fails, the designated back-up Track Engine takes control of the failed Track Engine's Radar to ensure no break or failure in the system. However, a Track Engine is only able to support double its allocated number of Radar: it cannot back-up two 'downed' Track Engine.
Topology Manager: this is the software that constantly manages the heartbeat, and initiates a back-up Management Server take-over if the primary Management Serve fails.
Schematic
triplicated and backed up using MongoDB software. For more information, go to Database Replication.
Onboard Tracker: the software inside the radar which analyses raw radar data and generates unique target data.
Track Engine:-
AID Rule Engine: the rule engine analyses all incoming tracks, looking for behaviours that would indicate an incident had occurred. For example, a stopped vehicle, or a pedestrian in the wrong area.
Track Recorder: this records all tracks processed by a Track Engine for posterity. These recorded tracks are not analysed as Live data. Each Track Engine has its own Track Recorder.
Third Party Systems
If you have your own management system connected to the Management Server, it is necessary that your software can identify if and when the primary Management Server fails and the system is transferred to the back-up Management Server. This is because your management system will also have to transfer to the back-up Management Server. Third party management systems cannot be connected to both the primary and alternate Management Servers at any one time, because only the primary will allow external connections.
Related information
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