Bigdata Dev Apache Hadoop Namenode

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• downgrade

  Downgrade this unit

• finalize

  Finalize and commit an in-progress upgrade

• ingest

  Ingest a file from a URL into HDFS.

  Params

  • dest_dir

    The destination directory in HDFS to put the file(s). If it, or any of its parents don't exist, they will be created. The name of the file itself will be taken from the URL.

  • url string

    One or more (space separated) file URLs to ingest into HDFS.

  Required

  url

• list-versions

  list available versions of hadoop

• nnbench

  Load test the NameNode hardware and configuration

  Params

  • basedir string

    DFS working directory with hostname automatically appended

  • blocksize integer

    block size

  • bytes integer

    bytes to write

  • maps integer

    number of map jobs

  • numfiles integer

    number of files

  • reduces integer

    number of reduces

  • repfactor integer

    replication factor per file

• prepare-upgrade

  Prepare HDFS for an upgrade

• restart-hdfs

  All of the HDFS processes can be restarted with this Juju action.

• smoke-test

  Verify that HDFS is working by creating and removing a small file.

• start-hdfs

  All of the HDFS processes can be started with this Juju action.

• start-namenode

  Start the NameNode service on this unit

• stop-hdfs

  All of the HDFS processes can be stopped with this Juju action.

• stop-namenode

  Stop the NameNode service on this unit

• testdfsio

  DFS IO Testing

  Params

  • buffersize integer

    Buffer size in bytes

  • filesize integer

    filesize in MB

  • mode string

    read or write IO test

  • numfiles integer

    number of files

  • resfile string

    Results file name

• upgrade

  Upgrade this unit