Hello. I've been running the vPork load generator against two Cassandra nodes running in VMs. I'm running a trunk build with W=2 and R=1 and out-of-the-box JVM_OPTS which should be fine, or so I thought. Throughput is lower than I expected. Are my expectations out-of-line?
Thanks, David Writing results to: /home/vpork/results/30-thread-pork-39 NumThreads : 30 Iterations : 2000 ReadOdds : 0.8 WriteOdds : 0.1 RewriteOdds : 0.1 Data Size : 24000 B Nodes file given: [configs/cassandra/nodes.conf] Attempting to read nodes file: /home/vpork/configs/cassandra/nodes.conf Using node: dev-a01 Using node: dev-a02 Testing if our store even works ... %0.50 num=1 rGB=0.00 wGB=0.00 rFail=0 wFail=0 notFound=0 ------------- Elapsed time: 2.71 sec Writes: Num Writes: 202 Write Throughput: 74.54 writes / sec Write Failures: 0 Write Latency: 125.78 ms Write Latency (%99): 454.67 ms Write Latency stdDev: 102.78 Bytes Written: 4.62 MB Thread w/Throughput: 0.19 KB / sec Total w/Throughput: 1747.00 KB / sec Reads: Num Read: 1602 Read Throughput: 591.14 reads / sec Read Failures: 0 Read Latency: 30.57 ms Read Latency (%99): 273.68 ms Read Latency stdDev: 50.19 Read Not Found: 29 (%1.81) Bytes Read: 20.19 MB Thread r/Throughput: 0.77 KB / sec Total r/Throughput: 7628.00 KB / sec