負荷をかける [ec2-user@ip-172-31-26-19 YCSB]$ ./bin/ycsb run cassandra-cql -p hosts=cassandra.ap-northeast-1.amazonaws.com -p port=9142 -P ./workloads/workloada_keyspaces -s -threads 100 -p cassandra.writeconsistencylevel=LOCAL_QUORUM -p c…