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Advances, Systems and Applications

Journal of Cloud Computing Cover Image

Table 9 Simulation results of scenario three (Highly 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% 3000 3500 4500 5500 6500 7500 8500
Number of blocks assigned according to the ECT rule 645.2 1140.3 2138.2 3142.3 4140.6 5136.1 6139.9
MPCT of Hadoop (time units) 256.0 254.7 219.7 195.9 190.5 177.8 169.0
MPCT of ECT (time units) 155.5 147.8 139.5 134.2 129.9 127.4 125.9
ECT reduction in MPCT 39.3% 42.0% 36.5% 31.5% 31.8% 28.3% 25.5%
NBRP under Hadoop 417.9 418.9 536.8 607.6 672.7 758.4 845.8
NBRP under ECT 119.1 151.2 206.7 268.4 340.5 400.7 457.3
ECT reduction in NBRP 71.5% 63.9% 61.5% 55.8% 49.4% 47.2% 45.9%