How to use cloudsim to simulate a dynamic change service chain?

[beddingearly]

I tried to simulate a function with a virtual machine and use a cloudlet to simulate a task. Each node represents a function, and a task must be completed by multiple functions, which needs to be completed by a->b->c function. Now in order to save computation time overhead, I want to dynamically change the position of the a, b, and c functions on different nodes, but the order is unchanged. At the same time, the topology is unchanged, and only the functions on the nodes are changed.
What do I need to do?Thanks!