
A QoS-Aware Architecture
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501
0
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100
150
200
250
300
Service request rate
(# of requests/min)
Simulation time (h)
042 6 8 1012141618202224
Figure 19.14 Service request rate.
0
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024681012141618202224
Simulation time (h)
Energy expenditure rate
(energy units per min)
With T
a
, T
s
and T
m
Only with T
a
Figure 19.15 Energy expenditure rate.
adaptation. Service adaptation is a set of activities to adaptively improve the quality
and availability of services provided by agents. The QoS is measured as response time
and throughput of agents for processing service requests from users. Service avail-
ability is measured as the number of agents. Resource adaptation ...