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Table 5 Clustering (17.79 GB) raster image using a 50 nodes Hadoop-cluster

From: Multi-dimensional geospatial data mining in a distributed environment using MapReduce

Block size (MB) Elapsed time (min) Average map time (min) Average shuffle time (min) Average merge time (min) Average reduce time (min) Total mapping time (min)
128 36.0 13.7 17.9 0.3 1.6 22.9
265 34.5 13.0 14.1 0.3 2.0 21.4
512 36.4 13.7 14.8 0.2 1.7 23.9
1024 49.5 23.5 32.7 0.5 1.9 34.6