Underperforming might be caused by my YCSB memcached driver... I'll revise it. Memcached utilized all CPUs during the benchmark. P.S. All VM images are open, y

Underperforming might be caused by my YCSB memcached driver... I'll revise it. Memcached utilized all CPUs during the benchmark. P.S. All VM images are open, you can repeat the benchmark if you wish.