I've configured a simple cluster using two PC with identical spec:

 cpu core i5 RAM: 8GB ddr3 Disk: 1TB 5400rpm Network: 1 G (I've test it with 
iperf, it really is!) 
using the common configs described in many sites including datastax itself:

cluster_name: 'MyCassandraCluster' num_tokens: 256 seed_provider: - class_name: 
org.apache.cassandra.locator.SimpleSeedProvider parameters: - seeds: 
"192.168.1.1,192.168.1.2" listen_address: rpc_address: 0.0.0.0 endpoint_snitch: 
GossipingPropertyFileSnitch 
Running stress tool:

cassandra-stress write n=1000000 -rate threads=1000 -mode native cql3 -node 
192.168.1.1,192.168.1.2 
Over each node it shows 39 K writes/seconds, but running the same stress tool 
command on cluster of both nodes shows 45 K writes/seconds. I've done all the 
tuning mentioned by apache and datastax. There are many use cases on the net 
proving Cassandra linear Scalability So what is wrong with my cluster?



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