From the setup page http://hyperdex.org/performance/setup/ each YCSB workload was run with only 16 threads. I'm not too sure how MongoDB and HyperDex go with concurrent connections, but Cassandra performance with YCSB will be much better if you increase the number of threads YCSB uses.
Also for the Cassandra benchmark, was caching turned on for the data column family in the usertable keyspace?
Additionally it would be great to see the operations per second for the "load" portion of workload A as this represents a 100% write workload.
Other than those few points HyperDex looks pretty cool and has some great read performance.
Also for the Cassandra benchmark, was caching turned on for the data column family in the usertable keyspace?
Additionally it would be great to see the operations per second for the "load" portion of workload A as this represents a 100% write workload.
Other than those few points HyperDex looks pretty cool and has some great read performance.