Advances, Systems and Applications
Table 6 Simulation results of slightly heterogeneous environment
From: An improved task assignment scheme for Hadoop running in the clouds
| Â | Scenario | |||
|---|---|---|---|---|
One | Two | Three | Four | |
RPC | 1.5 | 2.5 | 4.0 | 1.0 |
VPPT | ± 2.5% | ± 5% | ± 10% | ± 2.5% |
Average of Hadoop MPCT (time units) | 124.2 | 150.1 | 192.5 | 111.9 |
Standard deviation of Hadoop MPCT (time units) | 9.3 | 18.8 | 34.7 | 4.9 |
Average of ECT MPCT (time units) | 117.2 | 127.1 | 137.5 | 110.4 |
Standard deviation of ECT MPCT (time units) | 7.0 | 10.8 | 8.8 | 5.1 |
ECT reduction in average MPCT | 5.6% | 15.3% | 28.6% | 1.4% |
Average NBRP under Hadoop | 321.5 | 314.4 | 306.2 | ― |
Standard deviation of NBRP under Hadoop | 99.4 | 97.4 | 96.4 | ― |
Average NBRP under ECT | 226.6 | 82.4 | 7.5 | ― |
Standard deviation of NBRP under ECT | 80.7 | 60.2 | 10.9 | ― |
ECT reduction in average NBRP | 29.5% | 73.8% | 97.5% | ― |