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 3. Collect Information

Before deploying an HDP cluster, you should collect the following information:

  • The fully qualified domain name (FQDN) of each host in your system. The Ambari install wizard supports using IP addresses. You can use hostname -f to check or verify the FQDN of a host.

    [Note]Note

    Deploying all HDP components on a single host is possible, but is appropriate only for initial evaluation purposes. Typically, you set up at least three hosts; one master host and two slaves, as a minimum cluster. For more information about deploying HDP components, see the descriptions for a Typical Hadoop Cluster.

  • A list of components you want to set up on each host.

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

    • NameNode data

    • DataNodes data

    • Secondary NameNode data

    • Oozie data

    • YARN data (Hadoop version 2.x)

    • ZooKeeper data, if you install ZooKeeper

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

    [Important]Important

    You must use base directories that provide persistent storage locations for your HDP components and your Hadoop data. Installing HDP components in locations that may be removed from a host may result in cluster failure or data loss. For example: Do Not use /tmp in a base directory path.

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