MapR 5.1 is at End of Life (EOL) and no longer supported. Please see the latest documentation. This documentation is not being updated.

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5.1 Installation
This section provides information for installing with or without (manual) the MapRInstaller, installing patches, upgrading, and migrating.
Applying a Patch
MapR patches are version-specific and cumulative. Each patch contains the code fixes that were included in the previous patch for that MapR version.

MapR 5.1 Documentation

5.1 Installation
This section provides information for installing with or without (manual) the MapRInstaller, installing patches, upgrading, and migrating.
- Get Started: Install MapR
  The MapR Installer makes the installation of a MapR cluster easy. It installs MapR software after it takes you through the process of selecting services and configuring the cluster.
- Installation Guide
- Upgrade Guide
- Applying a Patch
  MapR patches are version-specific and cumulative. Each patch contains the code fixes that were included in the previous patch for that MapR version.
  - Step 1: Verify Cluster Readiness for a Patch
    Before you apply a patch, check that the cluster is ready for a patch to be applied. In addition to the prerequisites, consider verifying that the cluster utilizes best practices which will facilitate a more optimal patch installation.
  - Step 2: Apply the Patch to Data Nodes
    Apply the patch to nodes dedicated to storing and processing data prior to applying the patch on nodes that run the CLDB. This includes nodes that run the Fileserver for storage and processing components such as the Node Manager and the HBase client.
  - Step 3: Apply the Patch to CLDB Nodes
    Apply the patch to CLDB slave nodes prior to applying the patch on the master CLDB node. After you apply a patch to a CLDB node, you must verify that container 1 is fully replicated before proceeding to apply the patch to the next CLDB node.
- Migration Guide

Applying a Patch

MapR patches are version-specific and cumulative. Each patch contains the code fixes that were included in the previous patch for that MapR version.

MapR version-specific patches are available here: http://package.mapr.com/patches/releases/

Applying a patch is a 3 step process:

When you apply a patch to the cluster, the patched files along with original files (non-patched) are copied to the /opt/mapr/.patch folder. In the /opt/mapr/.patch folder, the file ending with .O is the original file (non-patched) and the file ending with .<patch_number> is the patched version. Therefore, if there is a file under /opt/mapr/.patch/lib/, you can compare that with the corresponding file under /opt/mapr/lib/ by using the md5sum command to verify that the patch was successfully deployed.

NOTE: A patch for a given software version can be removed, and an older patch for the same MapR software version can be installed. However, rolling back a cluster from a newer MapR version to an older version is not supported

For information on the bugs fixed in the patch:

Go to the MapR Customer Support web portal at www.mapr.com/support. After logging into the portal, click the "Patches" tab and choose the appropriate MapR version to view the list of bug fixes. You will then see the patch name for the fixes displayed.
View a copy of the latest Patch Release Notes.

Contact support@mapr.com if you need more information or if you face any problems with patch installation.