i need the controller load balancing algorithm in order balance the the load in control plane that distribute the load from overloaded controller to under loaded one.
No controller gives the best results. As per my suggestion do the implementation in python for which you need a server space and domains so as to show the migration
Take a look here: A novel object placement protocol for minimizing the average response time of get operations in distributed key-value stores, https://ieeexplore.ieee.org/abstract/document/8258300