040000 tree 818845b1fd1f96e1daaef4948866d6b221f79529	ephemeral-hdfs
040000 tree d098456f0f88c05235e7bba780ee47d2f8d541b4	mesos-ec2
040000 tree fc405eecd616fc494c2365c7fa1da902ef483599	persistent-hdfs
040000 tree 710d436edbcae179e850fc1fec616edfc8af631a	spark