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11.6.2 eXPerimental evaluation
We implemented two sets of experiments to evaluate the effectiveness of our adap-
tive replication controller in terms of its effect on the end-to-end system throughput
and the replication delay for the underlying database replicas. Figure 11.8 illustrates
the setup of our experiments using Amazon EC2 platform. In the rst set of experi-
ments, we x the value of the tolerance component (delay
tolerance
) of the SLA replica-
tion delay to 1000 milliseconds and vary the monitor interval (intvl
mon
) among the
following set of values: 60, 120, 240, and 480 seconds. In the second set of experi-
ments, ...