On Mon, May 9, 2011 at 5:58 PM, Alex Araujo <cassandra->> How many replicas are you writing? > > Replication factor is 3.
So you're actually spot on the predicted numbers: you're pushing 20k*3=60k "raw" rows/s across your 4 machines. You might get another 10% or so from increasing memtable thresholds, but bottom line is you're right around what we'd expect to see. Furthermore, CPU is the primary bottleneck which is what you want to see on a pure write workload. -- Jonathan Ellis Project Chair, Apache Cassandra co-founder of DataStax, the source for professional Cassandra support http://www.datastax.com
