Benchmark of how vnodes impact Shark/Spark execution performance for DSE 4.6. See `output.txt` for execution.

ec2-type.txt

m3-large

gen.py

import uuid
import sys

n = int(sys.argv[1])
print >> sys.stderr, "Populating", n, "items."
for i in range(n):
  print "INSERT INTO emp (empID, deptID, first_name, last_name) VALUES ({0},{1}, '{2}', '{3}');".format(i, i*2, str(uuid.uuid4()), str(uuid.uuid4()))

output.txt

root@ip-10-121-138-247:/home/ubuntu# # Installing Datastax Enterprise 4.6 using apt.
root@ip-10-121-138-247:/home/ubuntu# # # Enabling vnodes in /etc/dse/cassandra/cassandra.yaml.
root@ip-10-121-138-247:/home/ubuntu# time ./sparkbench_all.sh > with_vnodes_result.txt 2>&1

real    1411m25.761s
user    979m25.149s
sys     68m24.381s
root@ip-10-121-138-247:/home/ubuntu# # # Disabling vnodes in /etc/dse/cassandra/cassandra.yaml.
root@ip-10-121-138-247:/home/ubuntu# time ./sparkbench_all.sh > without_vnodes_result.txt 2>&1

real    1382m2.011s
user    966m52.110s
sys     68m21.212s

sparkbench.sh

#!/bin/bash
set -e

echo Running benchmark for $1 items.
service dse stop
cd /var/lib/cassandra
rm -fr *
service dse start

# Wait until started
sleep 100

cd ~ubuntu
cqlsh < sparkbench_cqlsh.txt
python gen.py $1 | cqlsh -k testkeyspace
dse shark < sparkbench_spark.txt
echo Done with benchmark.

sparkbench_all.sh

#!/bin/bash
./sparkbench.sh 2
./sparkbench.sh 10
./sparkbench.sh 100
./sparkbench.sh 1000
./sparkbench.sh 10000
./sparkbench.sh 100000
./sparkbench.sh 1000000
./sparkbench.sh 10000000
./sparkbench.sh 100000000

sparkbench_cqlsh.txt

CREATE KEYSPACE testkeyspace WITH replication = {'class': 'SimpleStrategy', 'replication_factor': '1'};
USE testkeyspace;
CREATE TABLE emp (   empID int,   deptID int,   first_name varchar,   last_name varchar,   PRIMARY KEY (empID, deptID) );

sparkbench_spark.txt

USE testkeyspace;
SELECT COUNT(*) FROM emp;
SELECT COUNT(*) FROM emp;
SELECT COUNT(*) FROM emp;
SELECT COUNT(*) FROM emp;
SELECT COUNT(*) FROM emp;
SELECT COUNT(*) FROM emp;

with_vnodes_result.txt

Running benchmark for 2 items.
 * Stopping DSE daemon dse
   ...done.
 * Starting DSE daemon dse

DSE daemon starting with Spark enabled (edit /etc/default/dse to disable)
DSE daemon starting with CFS enabled (edit /etc/default/dse to disable)
   ...done.
Populating 2 items.
Starting the Shark Command Line Client
Logging initialized using configuration in /etc/dse/shark/log4j.properties
Reloading cached RDDs from previous Shark sessions... (use -skipRddReload flag to skip reloading)
shark> USE testkeyspace;
OK
Time taken: 0.42 seconds
shark> SELECT COUNT(*) FROM emp;
OK
2
Time taken: 38.908 seconds
shark> SELECT COUNT(*) FROM emp;
OK
2
Time taken: 23.307 seconds
shark> SELECT COUNT(*) FROM emp;
OK
2
Time taken: 20.544 seconds
shark> SELECT COUNT(*) FROM emp;
OK
2
Time taken: 19.629 seconds
shark> SELECT COUNT(*) FROM emp;
OK
2
Time taken: 18.264 seconds
shark> SELECT COUNT(*) FROM emp;
OK
2
Time taken: 18.402 seconds
shark> Done with benchmark.
Running benchmark for 10 items.
 * Stopping DSE daemon dse
   ...done.
 * Starting DSE daemon dse

DSE daemon starting with Spark enabled (edit /etc/default/dse to disable)
DSE daemon starting with CFS enabled (edit /etc/default/dse to disable)
   ...done.
Populating 10 items.
Starting the Shark Command Line Client
Logging initialized using configuration in /etc/dse/shark/log4j.properties
Reloading cached RDDs from previous Shark sessions... (use -skipRddReload flag to skip reloading)
shark> USE testkeyspace;
OK
Time taken: 0.42 seconds
shark> SELECT COUNT(*) FROM emp;
OK
10
Time taken: 39.205 seconds
shark> SELECT COUNT(*) FROM emp;
OK
10
Time taken: 23.442 seconds
shark> SELECT COUNT(*) FROM emp;
OK
10
Time taken: 20.537 seconds
shark> SELECT COUNT(*) FROM emp;
OK
10
Time taken: 19.264 seconds
shark> SELECT COUNT(*) FROM emp;
OK
10
Time taken: 18.668 seconds
shark> SELECT COUNT(*) FROM emp;
OK
10
Time taken: 18.271 seconds
shark> 15/05/01 17:37:12 ERROR network.ConnectionManager: Corresponding SendingConnection to ConnectionManagerId(localhost,60047) not found
Done with benchmark.
Running benchmark for 100 items.
 * Stopping DSE daemon dse
   ...done.
 * Starting DSE daemon dse

DSE daemon starting with Spark enabled (edit /etc/default/dse to disable)
DSE daemon starting with CFS enabled (edit /etc/default/dse to disable)
   ...done.
Populating 100 items.
Starting the Shark Command Line Client
Logging initialized using configuration in /etc/dse/shark/log4j.properties
Reloading cached RDDs from previous Shark sessions... (use -skipRddReload flag to skip reloading)
shark> USE testkeyspace;
OK
Time taken: 0.422 seconds
shark> SELECT COUNT(*) FROM emp;
OK
100
Time taken: 38.668 seconds
shark> SELECT COUNT(*) FROM emp;
OK
100
Time taken: 23.751 seconds
shark> SELECT COUNT(*) FROM emp;
OK
100
Time taken: 20.571 seconds
shark> SELECT COUNT(*) FROM emp;
OK
100
Time taken: 19.273 seconds
shark> SELECT COUNT(*) FROM emp;
OK
100
Time taken: 18.555 seconds
shark> SELECT COUNT(*) FROM emp;
OK
100
Time taken: 18.254 seconds
shark> Done with benchmark.
Running benchmark for 1000 items.
 * Stopping DSE daemon dse
   ...done.
 * Starting DSE daemon dse

DSE daemon starting with Spark enabled (edit /etc/default/dse to disable)
DSE daemon starting with CFS enabled (edit /etc/default/dse to disable)
   ...done.
Populating 1000 items.
Starting the Shark Command Line Client
Logging initialized using configuration in /etc/dse/shark/log4j.properties
Reloading cached RDDs from previous Shark sessions... (use -skipRddReload flag to skip reloading)
shark> USE testkeyspace;
OK
Time taken: 0.424 seconds
shark> SELECT COUNT(*) FROM emp;
OK
1000
Time taken: 39.335 seconds
shark> SELECT COUNT(*) FROM emp;
OK
1000
Time taken: 23.683 seconds
shark> SELECT COUNT(*) FROM emp;
OK
1000
Time taken: 21.079 seconds
shark> SELECT COUNT(*) FROM emp;
OK
1000
Time taken: 19.698 seconds
shark> SELECT COUNT(*) FROM emp;
OK
1000
Time taken: 18.666 seconds
shark> SELECT COUNT(*) FROM emp;
OK
1000
Time taken: 18.778 seconds
shark> Done with benchmark.
Running benchmark for 10000 items.
 * Stopping DSE daemon dse
   ...done.
 * Starting DSE daemon dse

DSE daemon starting with Spark enabled (edit /etc/default/dse to disable)
DSE daemon starting with CFS enabled (edit /etc/default/dse to disable)
   ...done.
Populating 10000 items.
Starting the Shark Command Line Client
Logging initialized using configuration in /etc/dse/shark/log4j.properties
Reloading cached RDDs from previous Shark sessions... (use -skipRddReload flag to skip reloading)
shark> USE testkeyspace;
OK
Time taken: 0.418 seconds
shark> SELECT COUNT(*) FROM emp;
OK
10000
Time taken: 39.366 seconds
shark> SELECT COUNT(*) FROM emp;
OK
10000
Time taken: 23.92 seconds
shark> SELECT COUNT(*) FROM emp;
OK
10000
Time taken: 20.984 seconds
shark> SELECT COUNT(*) FROM emp;
OK
10000
Time taken: 19.482 seconds
shark> SELECT COUNT(*) FROM emp;
OK
10000
Time taken: 18.826 seconds
shark> SELECT COUNT(*) FROM emp;
OK
10000
Time taken: 18.853 seconds
shark> 15/05/01 17:50:34 ERROR network.ConnectionManager: Corresponding SendingConnection to ConnectionManagerId(localhost,40091) not found
15/05/01 17:50:34 ERROR network.ConnectionManager: Corresponding SendingConnection to ConnectionManagerId(localhost,40091) not found
15/05/01 17:50:34 WARN network.ConnectionManager: All connections not cleaned up
Done with benchmark.
Running benchmark for 100000 items.
 * Stopping DSE daemon dse
   ...done.
 * Starting DSE daemon dse

DSE daemon starting with Spark enabled (edit /etc/default/dse to disable)
DSE daemon starting with CFS enabled (edit /etc/default/dse to disable)
   ...done.
Populating 100000 items.
Starting the Shark Command Line Client
Logging initialized using configuration in /etc/dse/shark/log4j.properties
Reloading cached RDDs from previous Shark sessions... (use -skipRddReload flag to skip reloading)
shark> USE testkeyspace;
OK
Time taken: 0.416 seconds
shark> SELECT COUNT(*) FROM emp;
OK
100000
Time taken: 41.032 seconds
shark> SELECT COUNT(*) FROM emp;
OK
100000
Time taken: 25.189 seconds
shark> SELECT COUNT(*) FROM emp;
OK
100000
Time taken: 22.138 seconds
shark> SELECT COUNT(*) FROM emp;
OK
100000
Time taken: 20.478 seconds
shark> SELECT COUNT(*) FROM emp;
OK
100000
Time taken: 19.607 seconds
shark> SELECT COUNT(*) FROM emp;
OK
100000
Time taken: 19.827 seconds
shark> Done with benchmark.
Running benchmark for 1000000 items.
 * Stopping DSE daemon dse
   ...done.
 * Starting DSE daemon dse

DSE daemon starting with Spark enabled (edit /etc/default/dse to disable)
DSE daemon starting with CFS enabled (edit /etc/default/dse to disable)
   ...done.
Populating 1000000 items.
Starting the Shark Command Line Client
Logging initialized using configuration in /etc/dse/shark/log4j.properties
Reloading cached RDDs from previous Shark sessions... (use -skipRddReload flag to skip reloading)
shark> USE testkeyspace;
OK
Time taken: 0.421 seconds
shark> SELECT COUNT(*) FROM emp;
OK
1000000
Time taken: 51.348 seconds
shark> SELECT COUNT(*) FROM emp;
OK
1000000
Time taken: 34.197 seconds
shark> SELECT COUNT(*) FROM emp;
OK
1000000
Time taken: 31.564 seconds
shark> SELECT COUNT(*) FROM emp;
OK
1000000
Time taken: 30.569 seconds
shark> SELECT COUNT(*) FROM emp;
OK
1000000
Time taken: 29.664 seconds
shark> SELECT COUNT(*) FROM emp;
OK
1000000
Time taken: 29.094 seconds
shark> Done with benchmark.
Running benchmark for 10000000 items.
 * Stopping DSE daemon dse
   ...done.
 * Starting DSE daemon dse

DSE daemon starting with Spark enabled (edit /etc/default/dse to disable)
DSE daemon starting with CFS enabled (edit /etc/default/dse to disable)
   ...done.
Populating 10000000 items.
Starting the Shark Command Line Client
Logging initialized using configuration in /etc/dse/shark/log4j.properties
Reloading cached RDDs from previous Shark sessions... (use -skipRddReload flag to skip reloading)
shark> USE testkeyspace;
OK
Time taken: 0.519 seconds
shark> SELECT COUNT(*) FROM emp;
OK
10000000
Time taken: 155.338 seconds
shark> SELECT COUNT(*) FROM emp;
OK
10000000
Time taken: 135.418 seconds
shark> SELECT COUNT(*) FROM emp;
OK
10000000
Time taken: 131.599 seconds
shark> SELECT COUNT(*) FROM emp;
OK
10000000
Time taken: 131.105 seconds
shark> SELECT COUNT(*) FROM emp;
OK
10000000
Time taken: 129.764 seconds
shark> SELECT COUNT(*) FROM emp;
OK
10000000
Time taken: 129.513 seconds
shark> 15/05/01 20:18:02 WARN network.ConnectionManager: All connections not cleaned up
Done with benchmark.
Running benchmark for 100000000 items.
 * Stopping DSE daemon dse
   ...done.
 * Starting DSE daemon dse

DSE daemon starting with Spark enabled (edit /etc/default/dse to disable)
DSE daemon starting with CFS enabled (edit /etc/default/dse to disable)
   ...done.
Populating 100000000 items.
Starting the Shark Command Line Client
Logging initialized using configuration in /etc/dse/shark/log4j.properties
Reloading cached RDDs from previous Shark sessions... (use -skipRddReload flag to skip reloading)
shark> USE testkeyspace;
OK
Time taken: 0.466 seconds
shark> SELECT COUNT(*) FROM emp;
OK
100000000
Time taken: 1259.254 seconds
shark> SELECT COUNT(*) FROM emp;
OK
100000000
Time taken: 1238.126 seconds
shark> SELECT COUNT(*) FROM emp;
OK
100000000
Time taken: 1233.475 seconds
shark> SELECT COUNT(*) FROM emp;
OK
100000000
Time taken: 1234.755 seconds
shark> SELECT COUNT(*) FROM emp;
OK
100000000
Time taken: 1232.848 seconds
shark> SELECT COUNT(*) FROM emp;
OK
100000000
Time taken: 1236.304 seconds
shark> Done with benchmark.

without_vnodes_result.txt

Running benchmark for 2 items.
 * Stopping DSE daemon dse
   ...done.
 * Starting DSE daemon dse

DSE daemon starting with Spark enabled (edit /etc/default/dse to disable)
DSE daemon starting with CFS enabled (edit /etc/default/dse to disable)
   ...done.
Populating 2 items.
Starting the Shark Command Line Client
Logging initialized using configuration in /etc/dse/shark/log4j.properties
Reloading cached RDDs from previous Shark sessions... (use -skipRddReload flag to skip reloading)
shark> USE testkeyspace;
OK
Time taken: 0.413 seconds
shark> SELECT COUNT(*) FROM emp;
OK
2
Time taken: 9.051 seconds
shark> SELECT COUNT(*) FROM emp;
OK
2
Time taken: 1.931 seconds
shark> SELECT COUNT(*) FROM emp;
OK
2
Time taken: 1.332 seconds
shark> SELECT COUNT(*) FROM emp;
OK
2
Time taken: 1.868 seconds
shark> SELECT COUNT(*) FROM emp;
OK
2
Time taken: 1.449 seconds
shark> SELECT COUNT(*) FROM emp;
OK
2
Time taken: 1.152 seconds
shark> Done with benchmark.
Running benchmark for 10 items.
 * Stopping DSE daemon dse
   ...done.
 * Starting DSE daemon dse

DSE daemon starting with Spark enabled (edit /etc/default/dse to disable)
DSE daemon starting with CFS enabled (edit /etc/default/dse to disable)
   ...done.
Populating 10 items.
Starting the Shark Command Line Client
Logging initialized using configuration in /etc/dse/shark/log4j.properties
Reloading cached RDDs from previous Shark sessions... (use -skipRddReload flag to skip reloading)
shark> USE testkeyspace;
OK
Time taken: 0.409 seconds
shark> SELECT COUNT(*) FROM emp;
OK
10
Time taken: 9.034 seconds
shark> SELECT COUNT(*) FROM emp;
OK
10
Time taken: 1.872 seconds
shark> SELECT COUNT(*) FROM emp;
OK
10
Time taken: 1.368 seconds
shark> SELECT COUNT(*) FROM emp;
OK
10
Time taken: 1.869 seconds
shark> SELECT COUNT(*) FROM emp;
OK
10
Time taken: 1.443 seconds
shark> SELECT COUNT(*) FROM emp;
OK
10
Time taken: 1.239 seconds
shark> Done with benchmark.
Running benchmark for 100 items.
 * Stopping DSE daemon dse
   ...done.
 * Starting DSE daemon dse

DSE daemon starting with Spark enabled (edit /etc/default/dse to disable)
DSE daemon starting with CFS enabled (edit /etc/default/dse to disable)
   ...done.
Populating 100 items.
Starting the Shark Command Line Client
Logging initialized using configuration in /etc/dse/shark/log4j.properties
Reloading cached RDDs from previous Shark sessions... (use -skipRddReload flag to skip reloading)
shark> USE testkeyspace;
OK
Time taken: 0.412 seconds
shark> SELECT COUNT(*) FROM emp;
OK
100
Time taken: 9.246 seconds
shark> SELECT COUNT(*) FROM emp;
OK
100
Time taken: 1.92 seconds
shark> SELECT COUNT(*) FROM emp;
OK
100
Time taken: 1.43 seconds
shark> SELECT COUNT(*) FROM emp;
OK
100
Time taken: 1.914 seconds
shark> SELECT COUNT(*) FROM emp;
OK
100
Time taken: 1.493 seconds
shark> SELECT COUNT(*) FROM emp;
OK
100
Time taken: 1.147 seconds
shark> 15/05/02 19:09:22 ERROR network.ConnectionManager: Corresponding SendingConnection to ConnectionManagerId(localhost,44842) not found
Done with benchmark.
Running benchmark for 1000 items.
 * Stopping DSE daemon dse
   ...done.
 * Starting DSE daemon dse

DSE daemon starting with Spark enabled (edit /etc/default/dse to disable)
DSE daemon starting with CFS enabled (edit /etc/default/dse to disable)
   ...done.
Populating 1000 items.
Starting the Shark Command Line Client
Logging initialized using configuration in /etc/dse/shark/log4j.properties
Reloading cached RDDs from previous Shark sessions... (use -skipRddReload flag to skip reloading)
shark> USE testkeyspace;
OK
Time taken: 0.43 seconds
shark> SELECT COUNT(*) FROM emp;
OK
1000
Time taken: 9.264 seconds
shark> SELECT COUNT(*) FROM emp;
OK
1000
Time taken: 2.073 seconds
shark> SELECT COUNT(*) FROM emp;
OK
1000
Time taken: 1.447 seconds
shark> SELECT COUNT(*) FROM emp;
OK
1000
Time taken: 1.74 seconds
shark> SELECT COUNT(*) FROM emp;
OK
1000
Time taken: 1.532 seconds
shark> SELECT COUNT(*) FROM emp;
OK
1000
Time taken: 1.247 seconds
shark> 15/05/02 19:11:44 ERROR network.ConnectionManager: Corresponding SendingConnection to ConnectionManagerId(localhost,52733) not found
15/05/02 19:11:45 WARN network.ConnectionManager: All connections not cleaned up
Done with benchmark.
Running benchmark for 10000 items.
 * Stopping DSE daemon dse
   ...done.
 * Starting DSE daemon dse

DSE daemon starting with Spark enabled (edit /etc/default/dse to disable)
DSE daemon starting with CFS enabled (edit /etc/default/dse to disable)
   ...done.
Populating 10000 items.
Starting the Shark Command Line Client
Logging initialized using configuration in /etc/dse/shark/log4j.properties
Reloading cached RDDs from previous Shark sessions... (use -skipRddReload flag to skip reloading)
shark> USE testkeyspace;
OK
Time taken: 0.412 seconds
shark> SELECT COUNT(*) FROM emp;
OK
10000
Time taken: 11.031 seconds
shark> SELECT COUNT(*) FROM emp;
OK
10000
Time taken: 1.952 seconds
shark> SELECT COUNT(*) FROM emp;
OK
10000
Time taken: 1.496 seconds
shark> SELECT COUNT(*) FROM emp;
OK
10000
Time taken: 1.867 seconds
shark> SELECT COUNT(*) FROM emp;
OK
10000
Time taken: 1.476 seconds
shark> SELECT COUNT(*) FROM emp;
OK
10000
Time taken: 1.53 seconds
shark> Done with benchmark.
Running benchmark for 100000 items.
 * Stopping DSE daemon dse
   ...done.
 * Starting DSE daemon dse

DSE daemon starting with Spark enabled (edit /etc/default/dse to disable)
DSE daemon starting with CFS enabled (edit /etc/default/dse to disable)
   ...done.
Populating 100000 items.
Starting the Shark Command Line Client
Logging initialized using configuration in /etc/dse/shark/log4j.properties
Reloading cached RDDs from previous Shark sessions... (use -skipRddReload flag to skip reloading)
shark> USE testkeyspace;
OK
Time taken: 0.408 seconds
shark> SELECT COUNT(*) FROM emp;
OK
100000
Time taken: 12.852 seconds
shark> SELECT COUNT(*) FROM emp;
OK
100000
Time taken: 3.38 seconds
shark> SELECT COUNT(*) FROM emp;
OK
100000
Time taken: 2.446 seconds
shark> SELECT COUNT(*) FROM emp;
OK
100000
Time taken: 2.808 seconds
shark> SELECT COUNT(*) FROM emp;
OK
100000
Time taken: 2.521 seconds
shark> SELECT COUNT(*) FROM emp;
OK
100000
Time taken: 2.626 seconds
shark> Done with benchmark.
Running benchmark for 1000000 items.
 * Stopping DSE daemon dse
   ...done.
 * Starting DSE daemon dse

DSE daemon starting with Spark enabled (edit /etc/default/dse to disable)
DSE daemon starting with CFS enabled (edit /etc/default/dse to disable)
   ...done.
Populating 1000000 items.
Starting the Shark Command Line Client
Logging initialized using configuration in /etc/dse/shark/log4j.properties
Reloading cached RDDs from previous Shark sessions... (use -skipRddReload flag to skip reloading)
shark> USE testkeyspace;
OK
Time taken: 0.411 seconds
shark> SELECT COUNT(*) FROM emp;
OK
1000000
Time taken: 25.325 seconds
shark> SELECT COUNT(*) FROM emp;
OK
1000000
Time taken: 14.077 seconds
shark> SELECT COUNT(*) FROM emp;
OK
1000000
Time taken: 13.889 seconds
shark> SELECT COUNT(*) FROM emp;
OK
1000000
Time taken: 13.624 seconds
shark> SELECT COUNT(*) FROM emp;
OK
1000000
Time taken: 13.332 seconds
shark> SELECT COUNT(*) FROM emp;
OK
1000000
Time taken: 13.613 seconds
shark> 15/05/02 19:32:11 ERROR network.ConnectionManager: Corresponding SendingConnection to ConnectionManagerId(localhost,34444) not found
Done with benchmark.
Running benchmark for 10000000 items.
 * Stopping DSE daemon dse
   ...done.
 * Starting DSE daemon dse

DSE daemon starting with Spark enabled (edit /etc/default/dse to disable)
DSE daemon starting with CFS enabled (edit /etc/default/dse to disable)
   ...done.
Populating 10000000 items.
Starting the Shark Command Line Client
Logging initialized using configuration in /etc/dse/shark/log4j.properties
Reloading cached RDDs from previous Shark sessions... (use -skipRddReload flag to skip reloading)
shark> USE testkeyspace;
OK
Time taken: 0.406 seconds
shark> SELECT COUNT(*) FROM emp;
OK
10000000
Time taken: 141.819 seconds
shark> SELECT COUNT(*) FROM emp;
OK
10000000
Time taken: 124.746 seconds
shark> SELECT COUNT(*) FROM emp;
OK
10000000
Time taken: 121.652 seconds
shark> SELECT COUNT(*) FROM emp;
OK
10000000
Time taken: 121.609 seconds
shark> SELECT COUNT(*) FROM emp;
OK
10000000
Time taken: 120.836 seconds
shark> SELECT COUNT(*) FROM emp;
OK
10000000
Time taken: 120.774 seconds
shark> 15/05/02 21:37:11 ERROR network.ConnectionManager: Corresponding SendingConnection to ConnectionManagerId(localhost,36817) not found
Done with benchmark.
Running benchmark for 100000000 items.
 * Stopping DSE daemon dse
   ...done.
 * Starting DSE daemon dse

DSE daemon starting with Spark enabled (edit /etc/default/dse to disable)
DSE daemon starting with CFS enabled (edit /etc/default/dse to disable)
   ...done.
Populating 100000000 items.
Starting the Shark Command Line Client
Logging initialized using configuration in /etc/dse/shark/log4j.properties
Reloading cached RDDs from previous Shark sessions... (use -skipRddReload flag to skip reloading)
shark> USE testkeyspace;
OK
Time taken: 0.445 seconds
shark> SELECT COUNT(*) FROM emp;
OK
100000000
Time taken: 1225.747 seconds
shark> SELECT COUNT(*) FROM emp;
OK
100000000
Time taken: 1206.83 seconds
shark> SELECT COUNT(*) FROM emp;
OK
100000000
Time taken: 1207.403 seconds
shark> SELECT COUNT(*) FROM emp;
OK
100000000
Time taken: 1204.192 seconds
shark> SELECT COUNT(*) FROM emp;
OK
100000000
Time taken: 1206.776 seconds
shark> SELECT COUNT(*) FROM emp;
OK
100000000
Time taken: 1208.103 seconds
shark> 15/05/03 18:04:23 ERROR network.ConnectionManager: Corresponding SendingConnection to ConnectionManagerId(localhost,48652) not found
Done with benchmark.