I have such task:
Given are: set of nodes N (each with its power consumption) set of data servers D ⊂ N (each with available storage), set of computation servers C ⊂ N (each with available computational power), set of edges (each with its capacity), set of requests D (each with needed CPU power and requested storage). Demands are served by a pair of servers (storage + computation), traffic of size proportional to storage is generated between them. A node consumes energy if there is any traffic starting, ending, or passing through it. The task is to assign demands to servers in such a way that all constraints are met.
Having a power budget B, design a configuration that maximizes the number of served demands.
I need to write the AMPL model to solve this by cplex. Can someone help me with expressions?
