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From Jonathan Ellis <jbel...@gmail.com>
Subject Re: Ec2 Stress Results
Date Tue, 10 May 2011 02:49:57 GMT
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

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