Control theory is mostly based on physical devices and analog variables, so it does not often fit with software systems.
However you are right nonetheless. Large networks contain a lot of caching of different kinds and other forms of data replication.
Caches warm up by transferring data and the available bandwidth to do so is never infinite. Especially when flipping traffic between whole datacenters.
Most load balancing systems are simply unaware of this.
Control theory is mostly based on physical devices and analog variables, so it does not often fit with software systems.
However you are right nonetheless. Large networks contain a lot of caching of different kinds and other forms of data replication.
Caches warm up by transferring data and the available bandwidth to do so is never infinite. Especially when flipping traffic between whole datacenters.
Most load balancing systems are simply unaware of this.