Cassandra Stress Reads on Intel Edison

output.txt

./cassandra-stress read n=100000 -node 192.168.1.50
Warming up READ with 50000 iterations...
Failed to connect over JMX; not collecting these stats
INFO  18:41:53 Using data-center name 'datacenter1' for DCAwareRoundRobinPolicy (if this is incorrect, please provide the correct datacenter name with DCAwareRoundRobinPolicy constructor)
Connected to cluster: Edison Cluster
INFO  18:41:53 New Cassandra host /192.168.1.50:9042 added
Datatacenter: datacenter1; Host: /192.168.1.50; Rack: rack1
Sleeping 2s...
Running with 4 threadCount
Running READ with 4 threads for 100000 iteration
...
Results:
op rate                   : 238
partition rate            : 238
row rate                  : 238
latency mean              : 16.8
latency median            : 14.8
latency 95th percentile   : 25.6
latency 99th percentile   : 31.2
latency 99.9th percentile : 34.2
latency max               : 455.9
total gc count            : 9
total gc mb               : 1430
total gc time (s)         : 11
avg gc time(ms)           : 1188
stdev gc time(ms)         : 3083
Total operation time      : 00:07:00
Running with 8 threadCount
Running READ with 8 threads for 100000 iteration
...
Results:
op rate                   : 399
partition rate            : 399
row rate                  : 399
latency mean              : 20.0
latency median            : 17.3
latency 95th percentile   : 36.0
latency 99th percentile   : 46.4
latency 99.9th percentile : 52.2
latency max               : 334.9
total gc count            : 6
total gc mb               : 957
total gc time (s)         : 1
avg gc time(ms)           : 98
stdev gc time(ms)         : 10
Total operation time      : 00:04:10
Improvement over 4 threadCount: 68%
Running with 16 threadCount
Running READ with 16 threads for 100000 iteration
...
Results:
op rate                   : 588
partition rate            : 588
row rate                  : 588
latency mean              : 27.2
latency median            : 23.4
latency 95th percentile   : 51.0
latency 99th percentile   : 67.7
latency 99.9th percentile : 77.9
latency max               : 314.2
total gc count            : 5
total gc mb               : 797
total gc time (s)         : 0
avg gc time(ms)           : 90
stdev gc time(ms)         : 2
Total operation time      : 00:02:50
Improvement over 8 threadCount: 47%
Running with 24 threadCount
Running READ with 24 threads for 100000 iteration
...
Results:
op rate                   : 722
partition rate            : 722
row rate                  : 722
latency mean              : 33.2
latency median            : 27.2
latency 95th percentile   : 63.1
latency 99th percentile   : 87.0
latency 99.9th percentile : 141.5
latency max               : 2816.2
total gc count            : 5
total gc mb               : 798
total gc time (s)         : 0
avg gc time(ms)           : 90
stdev gc time(ms)         : 5
Total operation time      : 00:02:18
Improvement over 16 threadCount: 23%
Running with 36 threadCount
Running READ with 36 threads for 100000 iteration
...
Results:
op rate                   : 873
partition rate            : 873
row rate                  : 873
latency mean              : 41.2
latency median            : 33.8
latency 95th percentile   : 85.0
latency 99th percentile   : 122.9
latency 99.9th percentile : 146.3
latency max               : 521.7
total gc count            : 4
total gc mb               : 637
total gc time (s)         : 0
avg gc time(ms)           : 88
stdev gc time(ms)         : 2
Total operation time      : 00:01:54
Improvement over 24 threadCount: 21%
Running with 54 threadCount
Running READ with 54 threads for 100000 iteration
...
Results:
op rate                   : 1096
partition rate            : 1096
row rate                  : 1096
latency mean              : 49.2
latency median            : 40.8
latency 95th percentile   : 102.5
latency 99th percentile   : 155.3
latency 99.9th percentile : 186.1
latency max               : 474.3
total gc count            : 4
total gc mb               : 639
total gc time (s)         : 0
avg gc time(ms)           : 86
stdev gc time(ms)         : 1
Total operation time      : 00:01:31
Improvement over 36 threadCount: 25%
Running with 81 threadCount
Running READ with 81 threads for 100000 iteration
...
Results:
op rate                   : 1247
partition rate            : 1247
row rate                  : 1247
latency mean              : 64.9
latency median            : 55.8
latency 95th percentile   : 127.0
latency 99th percentile   : 183.9
latency 99.9th percentile : 222.2
latency max               : 463.3
total gc count            : 5
total gc mb               : 798
total gc time (s)         : 0
avg gc time(ms)           : 85
stdev gc time(ms)         : 2
Total operation time      : 00:01:20
Improvement over 54 threadCount: 14%
Running with 121 threadCount
Running READ with 121 threads for 100000 iteration
...
Results:
op rate                   : 1376
partition rate            : 1376
row rate                  : 1376
latency mean              : 87.8
latency median            : 79.5
latency 95th percentile   : 162.5
latency 99th percentile   : 225.5
latency 99.9th percentile : 261.2
latency max               : 599.9
total gc count            : 4
total gc mb               : 639
total gc time (s)         : 0
avg gc time(ms)           : 85
stdev gc time(ms)         : 1
Total operation time      : 00:01:12
Improvement over 81 threadCount: 10%
Running with 181 threadCount
Running READ with 181 threads for 100000 iteration
...
Results:
op rate                   : 1444
partition rate            : 1444
row rate                  : 1444
latency mean              : 125.3
latency median            : 117.4
latency 95th percentile   : 223.0
latency 99th percentile   : 287.3
latency 99.9th percentile : 325.3
latency max               : 710.5
total gc count            : 4
total gc mb               : 639
total gc time (s)         : 0
avg gc time(ms)           : 86
stdev gc time(ms)         : 1
Total operation time      : 00:01:09
Improvement over 121 threadCount: 5%
Running with 271 threadCount
Running READ with 271 threads for 100000 iteration
...
op rate                   : 1532
partition rate            : 1532
row rate                  : 1532
latency mean              : 176.9
latency median            : 159.0
latency 95th percentile   : 339.4
latency 99th percentile   : 452.8
latency 99.9th percentile : 516.1
latency max               : 1118.1
total gc count            : 4
total gc mb               : 638
total gc time (s)         : 0
avg gc time(ms)           : 88
stdev gc time(ms)         : 1
Total operation time      : 00:01:05
Improvement over 181 threadCount: 6%
Running with 406 threadCount
Running READ with 406 threads for 100000 iteration
...
Results:
op rate                   : 1515
partition rate            : 1515
row rate                  : 1515
latency mean              : 267.8
latency median            : 244.4
latency 95th percentile   : 501.6
latency 99th percentile   : 648.3
latency 99.9th percentile : 737.9
latency max               : 1364.0
total gc count            : 4
total gc mb               : 637
total gc time (s)         : 0
avg gc time(ms)           : 90
stdev gc time(ms)         : 4
Total operation time      : 00:01:06
Improvement over 271 threadCount: -1%
Running with 609 threadCount
Running READ with 609 threads for 100000 iteration
...
Results:
op rate                   : 1500
partition rate            : 1500
row rate                  : 1500
latency mean              : 403.8
latency median            : 359.8
latency 95th percentile   : 765.3
latency 99th percentile   : 937.9
latency 99.9th percentile : 1006.8
latency max               : 1771.4
total gc count            : 4
total gc mb               : 639
total gc time (s)         : 0
avg gc time(ms)           : 97
stdev gc time(ms)         : 3
Total operation time      : 00:01:06
Improvement over 406 threadCount: -1%
Running with 913 threadCount
Running READ with 913 threads for 100000 iteration
...
Results:
op rate                   : 1501
partition rate            : 1501
row rate                  : 1501
latency mean              : 604.5
latency median            : 570.4
latency 95th percentile   : 1128.8
latency 99th percentile   : 1414.5
latency 99.9th percentile : 2057.2
latency max               : 2870.5
total gc count            : 4
total gc mb               : 639
total gc time (s)         : 0
avg gc time(ms)           : 98
stdev gc time(ms)         : 1
Total operation time      : 00:01:06
Improvement over 609 threadCount: 0%
...
         id, total ops , adj row/s,    op/s,    pk/s,   row/s
  4 threads, 100000    ,       238,     238,     238,     238
  8 threads, 100000    ,        -0,     399,     399,     399
 16 threads, 100000    ,       588,     588,     588,     588
 24 threads, 100000    ,       725,     722,     722,     722
 36 threads, 100000    ,        -0,     873,     873,     873
 54 threads, 100000    ,        -0,    1096,    1096,    1096
 81 threads, 100000    ,        -0,    1247,    1247,    1247
121 threads, 100000    ,        -0,    1376,    1376,    1376
181 threads, 100000    ,        -0,    1444,    1444,    1444
271 threads, 99688     ,        -0,    1532,    1532,    1532
406 threads, 100000    ,        -0,    1515,    1515,    1515
609 threads, 100000    ,        -0,    1500,    1500,    1500
913 threads, 100000    ,      1509,    1501,    1501,    1501
END