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Advances, Systems and Applications

Journal of Cloud Computing Cover Image

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%