null How to set up and configure Pentaho (Kettle, Pentaho Data Integration, Pentaho Business Analytics Suite) for your specific Hadoop distribution.

This page applies to Kettle, Pentaho Data Integration (DI) and Pentaho Business Analytics (BA) Suite version 5.0 only.  For Kettle 4.4 (or Pentaho BA suite 4.8) see this page.

NOTE: Pentaho is pre-configured for Apache Hadoop 0.20.2. If you are using this distribution and version, no further configuration is required.

Pentaho supports different versions of Hadoop distributions from many vendors such as Apache, Cloudera, DataStax, Hortonworks, Intel, and MapR. How can Pentaho support so many Hadoop distributions? The secret is that 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 either redirects or handles them, or changes 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.

Determine the proper shim for your Hadoop Distro and version

In the following table, click the tab of the Hadoop distribution that you are interested in, then locate the version of the distribution you want to use. Note the name of the corresponding shim and the minimum version of the Pentaho software that supports it.

For example, if you want to use the Cloudera's CDH 4.2.1, click the Cloudera tab, then look in the Hadoop version column. CDH4.2.x is supported with shim cdh42. You need to have Pentaho Business Analytics (or Pentaho Data Integration) version 5.0 or later installed to use this shim.

Pentaho Shim Support Matrix

* NS - Not supported. See Hadoop Configurations for information on how to create or modify a shim to support your configuration

+ Pentaho Ver is the earliest version of the Pentaho suite that supports this shim. Subsequent Pentaho versions will also support this shim unless otherwise noted.

** 5.0.4 - Only supported with Big Data Plugin 5.0.4 or later. EE Customers can upgrade to 5.0.4 by going to support.pentaho.com CE Users can upgrade by following the Upgrade Hadoop in Community Edition to 5.0.4 instructions.

If the Hadoop distribution you want is supported but not installed by default*

You need to download the shim from our support site. If you need to download the shim, click the Download link for the shim in the above table. For a list of all available shims, go to 5.0.0 shims for version 5.0.0 to 5.0.3 and 5.0.4 shims.

Go to Install Hadoop Distribution Shim for instructions on how to install the shim.

If the Hadoop distribution you want isn't listed as supported in the table.*

• Check the archives for older shims.  If you find the shim you want there, download it, then go to Install Hadoop Distribution Shim for instructions on how to install the shim.
• Look at the following table of Jira cases. The shim you want might be scheduled for development, but not yet released.
• If you still can't find the shim, but want request that Pentaho develop one, fill out a Jira ticket.
• If you still can't find the shim, but want to develop it yourself, check out the Hadoop Configuration page for more information.

Open JIRA Cases for Hadoop Distribution Support

Set Active Hadoop Distribution

NOTE:  If you want to set MapR as the active distribution, go to the Special Pentaho Configuration Instructions for Your Hadoop Distributions page.

Specify which Hadoop Distribution you want to make active. Do this for each Pentaho component that you want to access the Hadoop distribution from. Pentaho components include the DI and BA Servers as well as design tools such as Spoon, Report Designer, and Metadata Editor. Note that only one distribution can be active at a time; so each time you want to change the distribution, you will need to reset the active Hadoop distribution.

      1. If you have not done so already, stop the components (Spoon, DI Server, BA Server, Report Designer, Metadata Editor) from which you want to access the Hadoop distribution.

      2. Do these things for each Pentaho component that you want to access the Hadoop distribution from.

      3. Navigate to the directory that contains the plugin.properties file for the component.

• DI Server - data-integration-server/pentaho-solutions/system/kettle/plugins/pentaho-big-data-plugin
• BA Server - biserver-ee/pentaho-solutions/system/kettle/plugins/pentaho-big-data-plugin
• Spoon - data-integration/plugins/pentaho-big-data-plugin
• Report Designer - report-designer/plugins/pentaho-big-data-plugin
• Metadata Editor - metadata-editor/plugins/pentaho-big-data-plugin

     4. Open the plugin.properties file.   

     5. Set the active.hadoop.configuration property to match the name of the shim you want to make active. For example, if the name of the shim is cdh42, then the code would look like this: active.hadoop.configuation=cdh42.

     6. Save and close the plugin.properties file.

     7. If you want to configure CDH 5 to use Map Reduce 1 instead of Map Reduce 2, follow the instructions in the Special Pentaho Configuration Instructions for Your Hadoop Distributions page.

     8. Start the component.

Next Steps

Now that you've configured Pentaho for your Hadoop distribution, there are many things you can do.  Here are a few links to get you started!

• Check out how to load data in a Hadoop cluster.
• Learn how to transform data within a cluster.
• Read about how to extract data from a cluster.
• View information on how to report data in Hadoop.
• Learn more about Pentaho MapReduce.
• Explore the Pentaho Infocenter to learn more about Pentaho software.

Want to switch gears and read something a little different? Check out these articles on the evolution of Hadoop.

• Part I and Part II of Genealogy of Elephants
• A brief history of Apache Hadoop branches and releases