Breakdown of HDFS-7240 sub-tasks:

    HDFS-8210. Ozone: Implement storage container manager. (Jitendra Pandey)

    HDFS-8392. Ozone: DataNode support for multiple datasets. (Arpit Agarwal)

    HDFS-8456. Ozone: Introduce STORAGE_CONTAINER_SERVICE as a new NodeType.
    (Arpit Agarwal)