Config Group 

    NameNode

    NameNode directories

    NameNode Java heap size

    1GB
    0 GB
    2.75 GB
    5.667 GB

    NameNode Server threads

    50
    1
    101
    200

    Minimum replicated blocks %

    100%
    99 %
    99.5 %
    100 %

    DataNode

    DataNode directories

    DataNode failed disk tolerance

    0
    0
    1

    DataNode maximum Java heap size

    1GB
    0 GB
    1.875 GB
    3.7 GB

    DataNode max data transfer threads

    16384
    0
    24000
    48000