Advances, Systems and Applications
Table 3 Simulation results of scenario one (Slightly 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% | 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) | 141.4 | 140.8 | 129.4 | 123.2 | 118.7 | 115.6 | 113.6 |
MPCT of ECT (time units) | 133.7 | 123.2 | 118.4 | 115.4 | 113.5 | 111.6 | 110.4 |
ECT reduction in MPCT | 5.4% | 12.5% | 8.5% | 6.3% | 4.4% | 3.4% | 2.8% |
NBRP under Hadoop | 297.3 | 85.7 | 222.4 | 315.2 | 375.5 | 413.9 | 449.9 |
NBRP under ECT | 159.4 | 56.4 | 143.5 | 214.7 | 265.7 | 300.4 | 325.6 |
ECT reduction in NBRP | 46.4% | 34.2% | 35.5% | 31.9% | 29.2% | 27.4% | 27.6% |