Recently, Google has launched PerfKit, an open-source cloud benchmarking
tool. The PerfKit tools currently support Google’s
own Compute Engine, Amazon’s AWS and Microsoft’s Azure
clouds
The benchmarking test conducted by Engineers at the University
of Toronto in 2012 found that, Apache Cassandra is the
winner throughout their experiments. End Point Corporation, a
database and open source consulting company, benchmarked the
top 3 NoSQL databases as follows, all using a variety workloads on
Amazon Web Services(AWS)