4. Collect Information

To deploy your Hadoop installation, you need to collect the following information:

  • The fully qualified domain name (FQDN) for each host in your system, and which components you want to set up on which host. The Ambari install wizard does not support using IP addresses. You can use hostname -f to check for the FQDN if you do not know it.

  • The base directories you want to use as mount points for storing:

    • NameNode data

    • DataNodes data

    • MapReduce data

    • ZooKeeper data, if you install ZooKeeper

    • Various log, pid, and db files, depending on your install type

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