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

Home
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.
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.

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

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.

About this task

NOTE: For clusters with more than 100 data nodes, it is a best practice to apply the patch in batches. Also, wait a few minutes before proceeding to the next batch of nodes.

Complete the following steps on each data node:

Procedure

Stop the MapR Warden and ZooKeeper (if installed) services:
1. To stop MapR Warden , run the following command:
```
sudo service mapr-warden stop
```
2. If Zookeeper is installed on the node, run this command:
```
sudo service mapr-zookeeper stop
```
If there is already a patch installed on the cluster, run one of the following commands to uninstall it:
- On CentOS/Redhat: sudo rpm -e mapr-patch
- On SUSE: sudo zypper remove mapr-patch
- On Ubuntu: sudo apt-get -y remove mapr-patch
Install the patch using one of the following commands:
- On CentOS/RedHat: sudo rpm -ivh mapr-patch-<new_patch_number>.rpm
- On SUSE: sudo zypper install mapr-patch-<new_patch_number>.rpm
- On Ubuntu: sudo dpkg -i mapr-patch<new_patch_number>.deb
Start the MapR Warden and ZooKeeper (if installed) services:
1. If ZooKeeper is installed on the node, run this command to start ZooKeeper:
```
sudo service mapr-zookeeper start
```
2. To start Warden, run this command:
```
sudo service mapr-warden start
```
To verify that the patch was installed successfully, run one of the following commands:
- On CentOS/Redhat or SUSE: sudo rpm -ql mapr-patch-<new_patch_number>
- On Ubuntu: sudo dpkg -l | grep mapr-patch-<new_patch_number>