HA 4 Nodes - 8GB/Node 2NN, 3DN, 3NM (VMs deployed on 4 different HDD and tuned JVM parameters)

TestDFSIO_results.log

----- TestDFSIO ----- : write
           Date & time: Sun May 18 08:15:05 CST 2014
       Number of files: 10
Total MBytes processed: 10000.0
     Throughput mb/sec: 9.214067669955782
Average IO rate mb/sec: 9.27421760559082
 IO rate std deviation: 0.7552383706698728
    Test exec time sec: 261.614

----- TestDFSIO ----- : write
           Date & time: Sun May 18 08:19:35 CST 2014
       Number of files: 10
Total MBytes processed: 10000.0
     Throughput mb/sec: 9.161099771705393
Average IO rate mb/sec: 9.212239265441895
 IO rate std deviation: 0.697205690834932
    Test exec time sec: 267.749

----- TestDFSIO ----- : write
           Date & time: Sun May 18 08:24:00 CST 2014
       Number of files: 10
Total MBytes processed: 10000.0
     Throughput mb/sec: 9.972734543757367
Average IO rate mb/sec: 10.036139488220215
 IO rate std deviation: 0.7994382400454961
    Test exec time sec: 261.807

----- TestDFSIO ----- : read
           Date & time: Sun May 18 08:06:50 CST 2014
       Number of files: 10
Total MBytes processed: 10000.0
     Throughput mb/sec: 43.41766491114575
Average IO rate mb/sec: 71.90406799316406
 IO rate std deviation: 56.721369827402256
    Test exec time sec: 98.381

----- TestDFSIO ----- : read
           Date & time: Sun May 18 08:08:18 CST 2014
       Number of files: 10
Total MBytes processed: 10000.0
     Throughput mb/sec: 91.9709371838499
Average IO rate mb/sec: 157.44992065429688
 IO rate std deviation: 85.86532779420118
    Test exec time sec: 84.748

----- TestDFSIO ----- : read
           Date & time: Sun May 18 08:09:33 CST 2014
       Number of files: 10
Total MBytes processed: 10000.0
     Throughput mb/sec: 82.27879346377264
Average IO rate mb/sec: 172.64614868164062
 IO rate std deviation: 104.63096757961688
    Test exec time sec: 72.312