Documentation

Computer allocation problem:

• We have three virtual machines (VMs) which require 100, 50 and 15 GB hard disk respectively.
• There are three servers with capabilities 100, 75 and 200 GB in that order.

• Find out a way to place VMs into servers in order to

  • Minimize the number of servers used
  • Minimize the operation cost (the servers have fixed daily costs 10, 5 and 20 USD respectively.)

We have:

>>> optimize Lexicographic allocate Optimal model: x11 = False :: Bool x12 = False :: Bool x13 = True :: Bool x21 = False :: Bool x22 = False :: Bool x23 = True :: Bool x31 = False :: Bool x32 = False :: Bool x33 = True :: Bool noOfServers = 1 :: Integer cost = 20 :: Integer 

That is, we should put all the jobs on the third server, for a total cost of 20.