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

Algorithm 2

VM migration.

Input:  Current Utility set (cu)

 Predicted Utility set (pu)

Output: Decision of VM migration, if migrate then at which time stamp.

// t is the timestamp and T is the time-period of 3 time-stamps (t₁, t₂, t₃)

VM Migration (cu set, pu set) //function receiving current and predicted utility datasets as parameters

1. Initialize: time stamp t =0

2. while ( t <= n-1) //n is the total no of time stamps

3.  if (t = = 0)

4.   cu_avg= cu_t

5.  else if (t = = 1)

6.   cu_avg= (cu_t + cu_t-1)/2

7.  else

8.   cu_avg= (cu_t + cu_t-1 + cu_t-2)/3

9.  T₁ = pu_t+1

10.  T₂ = (pu_t+1+ pu_t+2)/2

11.  T₃ = (pu_t+1 + pu_t+2 + pu_t+3)/3

12.  if (t = = n - 2)

13.   T₃ = - ∞

14.  else if (t = = n-1)

15.   T₃ = - ∞

16.   T₂ = - ∞

17.  end if

18.  Migrate (t, cu_avg, T₁, T₂, T₃)//calling Migrate function

19.  t = t+1

20. End while