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Advances, Systems and Applications

Table 4 A pairwise comparison was conducted to evaluate the impact of implementing various features, including automatic migration (AM) and server consolidation (Co), on the statistical mean difference between algorithms for energy consumption and number of service migrations. The analysis considered both homogeneous and heterogeneous cloud environments

From: Agent-based cloud simulation model for resource management

Algo.

AM\(^-\), Co\(^-\) (Energy)

AM\(^+\), Co\(^-\) (#Migration)

AM\(^+\), Co\(^+\) (#Migration)

He-2SE

He-3SE

Ho-{2,3}SE

He-2SE

He-3SE

Ho-2SE

Ho-3SE

He-2SE

He-3SE

ff - bf

0.247

0.303

-1.69

1.83

1.81

-1.57

-1.58

0.77

0.72

mu - bf

4.017

4.146

-1.53

0.51

0.50

-1.39

-1.37

-1.66

-1.45

me - bf

-2.621

-2.565

-0.85

0.50

0.49

-0.38

-0.39

-0.92

-0.80

rnd -bf

0.989

1.061

-0.67

2.02

2.01

-0.39

-0.37

0.25

0.23

mu - ff

3.769

3.843

0.16

-1.32

-1.31

0.18

0.21

-2.43

-2.17

me - ff

-2.868

-2.868

0.84

-1.33

-1.32

1.19

1.19

-1.69

-1.52

rnd - ff

0.741

0.757

1.02

0.19

0.20

1.18

1.21

-0.52

-0.49

me - mu

-6.638

-6.711

0.68

-0.016

-0.01

1.01

0.98

0.74

0.65

rnd - mu

-3.028

-3.086

0.86

1.51

1.51

1.00

1.00

1.91

1.68

rnd - me

3.609

3.626

0.18

1.52

1.52

-0.01

0.02

1.17

1.03

  1. The differences between algorithms were calculated using Tukey Honest Significance Differences method, considering both homogeneous (Ho) and heterogeneous (He) cloud environments. The mean differences between 2SE and 3SE with/without auto-migration (AM\(^{+/-}\)) and server consolidation (Co\(^{+/-}\)) features were analyzed separately for each environment type. Since the mean differences in homogeneous clouds are identical when comparing 2SE with AM\(^+\) to 3SE with AM\(^+\), these values have been merged into a single column under “Ho-{2, 3}SE”