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HDFS

\n
    \n
  1. NameNode
    2. \n
\n

Master, Metadata

\n\n

NameNode itself\nSecondary namenode\nStandby namenode

\n
    \n
  1. DataNode\nSlave, read/write
    2. \n
\n

\n \n \n \n \n

\n

Hadoop CLI

\n\n

Data Units

\n\n

File formats

\n\n

partition directories\nbucket files

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