I have installed DSE 5.1.15 on one AWS t2.large instance using Datastax Installer with root permissions. I have specified different directory location for data alone and left rest of the directory locations as default. Upon start up I could see data directory in the specified path with all system keyspaces in it. And I have created a keyspace in cqlsh and it got created. However, directory structure for that keyspace did not get created under data directory. Not sure in which location it got stored and what exactly happened here!