Advances, Systems and Applications
Table 5 Simulation results of scenario three (Slightly heterogeneous environment, high remote fetching overhead, and less stable slot processing speeds)
From: An improved task assignment scheme for Hadoop running in the clouds
RPC = 4.0 | Total number of data blocks | ||||||
|---|---|---|---|---|---|---|---|
VPPT = ± 10% | 2500 | 3000 | 4000 | 5000 | 6000 | 7000 | 8000 |
Number of blocks assigned according to the ECT rule | 500 | 1000 | 2000 | 3000 | 4000 | 5000 | 6000 |
MPCT of Hadoop (time units) | 260.1 | 249.1 | 210.0 | 186.9 | 170.5 | 160.8 | 155.3 |
MPCT of ECT (time units) | 148.7 | 155.8 | 145.9 | 140.0 | 135.9 | 132.5 | 128.4 |
ECT reduction in MPCT | 42.8% | 37.4% | 30.5% | 25.1% | 20.3% | 17.6% | 17.3% |
NBRP under Hadoop | 260.4 | 95.4 | 204.8 | 298.7 | 358.3 | 402.1 | 437.8 |
NBRP under ECT | 0 | 0 | 0.1 | 1.7 | 6.6 | 14.6 | 26.6 |
ECT reduction in NBRP | 100% | 100% | 100% | 99.4% | 98.2% | 96.4% | 93.9% |