[Retracted] Sustainable Technical Debt-Aware Computing Model for Virtual Machine Migration (TD4VM) in IaaS Cloud

Algorithm 1

Utility.

Input: Cpu& Memory Usages Set (Cpu_Usage& Memory_Usage) //Actual And Predicted Datasets Cpu& Memory Provisioning Set (Cpu_provisioning& Memory_provisioning)

Constant Input: Cpu& Memory Executioncost (Cpu_{executioncost}&Memory_{executioncost})

Fixed Penalty Cost

Principal // Principal is the Rework Cost of VM

Output: Actual Utility/Predicted Utility Of VM

Utility (Cpu_Usage, Memory_Usage, Cpu_provisioning, Memory_provisioning)

1. Initialize: Interest =0

2.    Penalty =0

3. For (Each Time Stamp)

4.  Cpu_cost = Cpu_usage * Cpu_{executioncost}

5.  Memory_cost = Memory_usage* Memory_{executioncost}

6.  Current Utility = Cpu_cost + Memory_cost //Calculating VM Running Cost

7.  Debt_memory = (Current Memory_provisioning - Memory_usage) * Memory_{executioncost}

8.  Debt_cpu = (Current Cpu_provisioning - Cpu_usage) * Cpu_{executioncost}

9.  If ((Cpu_provisioning + Memory_provisioning) > (Cpu_Usage+ Memory_Usage)) // Over-Provisioning

10.   Interest =Debt_cpu + Debt_memory

11. Else // Under-Provisioning

12.   % of Penalty =100 – ((Cpu_Usage / Cpu_provisioning) + (Memory _Usage / Memory _Provisioning))*50

13.   Penalty = Fixed Penalty Cost * (% Of Penalty)

14.  End If

15.  Total Debt = Interest + Penalty + Principal // For Actual/Predicted Datasets

16.  Actual Utility = Current Utility - Penalty // Generates Actual Utility

17.  Predicted Utility = Current Utility - Technical Debt // Generates Predicted Utility

18. End For