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Pentaho supports different versions of Hadoop distributions from several vendors such as Cloudera, Hortonworks, and MapR. To support this many versions, Pentaho uses an abstraction layer, called a shim, that connects to the different Hadoop distributions. A shim is a small library that intercepts API calls and redirects or handles them, or changes the calling parameters. Periodically, Pentaho develops new shims as vendors develop new Hadoop distributions and versions. These big data shims are tested and certified by Pentaho engineers. The following steps will help you get Pentaho set up to work with your Hadoop cluster.

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• If the Hadoop Distribution that you want to use is not listed, visit our 5.1/5.2 and 5.0 pages; a previous version of our software might support older Hadoop Distributions.  Downloads appear there as well.
• You can request that Pentaho develop a shim for a distribution by contacting sales or filling out a Jira ticket or if you are an EE subscription customer, you can contact Pentaho Support.
• You can develop a shim yourself. Check out the Hadoop Configurations for more information.
  

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  SetActiveShim SetActiveShim

Note:  For instructions on preparing the shim to connect to a Kerberos cluster, see our Mindtouch documentation here: https://help.pentaho.com/Documentation/5.4/0P0/0W0/030/040.

Set Active Hadoop Distribution

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