Advances, Systems and Applications
Table 7 Simulation results of scenario one (Highly heterogeneous environment, low remote fetching overhead, and stable slot processing speeds)
From: An improved task assignment scheme for Hadoop running in the clouds
RPC = 1.5 | Total number of data blocks | ||||||
|---|---|---|---|---|---|---|---|
VPPT = ± 2.5% | 3000 | 3500 | 4500 | 5500 | 6500 | 7500 | 8500 |
Number of blocks assigned according to the ECT rule | 725.1 | 1225.5 | 2226.0 | 3224.3 | 4225.7 | 5227.8 | 6224.3 |
MPCT of Hadoop (time units) | 139.0 | 140.4 | 127.0 | 123.3 | 120.9 | 116.1 | 115.3 |
MPCT of ECT (time units) | 119.8 | 116.7 | 111.8 | 108.5 | 106.9 | 105.1 | 104.1 |
ECT reduction in MPCT | 13.8% | 16.9% | 11.9% | 12.0% | 11.6% | 9.4% | 9.7% |
NBRP under Hadoop | 435.3 | 468.4 | 631.3 | 733.7 | 883.4 | 1030.4 | 1145.0 |
NBRP under ECT | 394.0 | 459.0 | 558.3 | 664.0 | 780.4 | 879.2 | 993.6 |
ECT reduction in NBRP | 9.5% | 2.0% | 11.6% | 9.5% | 11.7% | 14.7% | 13.2% |