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Prerequisites

Before you begin to work with a Hadoop cluster as a target in Qlik Replicate, make sure that the following prerequisites have been met:

  • General:

    • The Hadoop WebHDFS must be accessible from the Qlik Replicate machine.
    • The Hadoop Data Nodes must be accessible from the Qlik Replicate machine.
    • The Hadoop WebHDFS service must be running.

  • ODBC Access:

    When accessing Hive using ODBC, the following ODBC drivers are supported:

    • Hortonworks: Cloudera ODBC Driver for Apache Hive 2.06.09.1009 only.

    • Cloudera: Cloudera ODBC Driver for Apache Hive 2.06.09.1009 only.

      Information note

      Cloudera ODBC drivers 2.5.20 or later do not support the Snappy compression method.

  • SSL: Before you can use SSL, you first need to perform the following tasks:

    • Configure each NameNode and each DataNode with an SSL certificate (issued by the same CA).
    • Place the CA certificate on the Replicate Server machine. The certificate should be a base64-encoded PEM (OpenSSL) file.

  • Permissions: The user specified in the Hadoop target settings must have write permission for the specified HDFS target directory.

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