...
Keeps track of the traffic to each Cloud Service cluster, and makes decisions related to scaling the system up and down depending on the load fluctuation.
It is also responsible for keeping a sanity check on the system. This sanity check ensures that the minimum system configuration, such as the minimum number of running instances of each Service and load balancer cluster is maintained at all timesservice instances specified in the loadbalancer.conf file, is maintained at all times. If not, it automatically calls auto-scaler service and spawns instances to match the minimum count of each service domain.
Synapse Mediation Framework
...