MapR 5.2 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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5.2 Installation
This section contains information on installing and upgrading MapR. It also contains information on how to migrate data and applications from an Apache Hadoop cluster to a MapR cluster.
Installing MapR or MEP Components
Describes how to install MapR software and MapR Expansion Pack (MEP) components with the MapR Installer or without the MapR Installer.
Preparing each Node
Identifies major factors in preparing each node in your cluster.
Software
In order to run MapR software and Hadoop, you must install certain software on your node.

MapR 5.2 Documentation

5.2 Installation
This section contains information on installing and upgrading MapR. It also contains information on how to migrate data and applications from an Apache Hadoop cluster to a MapR cluster.
- Installing MapR or MEP Components
  Describes how to install MapR software and MapR Expansion Pack (MEP) components with the MapR Installer or without the MapR Installer.
  - MapR Repositories and Packages
    Describes the repositories for MapR software and Hadoop Ecosystem tools.
  - Planning the Cluster
    Describes information and factors used in planning your cluster.
  - Preparing each Node
    Identifies major factors in preparing each node in your cluster.
    - CPU and Operating System
      This section describes how to check that your processor and operating system are supported by MapR software.
    - Memory and Disk Space
      This section outlines required and recommended memory, storage, and disk capacities.
    - Connectivity
      This section outlines and troubleshoots connectivity requirements.
    - Software
      In order to run MapR software and Hadoop, you must install certain software on your node.
    - Infrastructure
      This section identifies certain software and settings that contribute to your node's infrastructure.
  - Installing with the MapR Installer
    The MapR Installer automates the process of installing MapR software and offers you a variety of options to complete the installation.
  - Installing without the MapR Installer
    Describes how to install MapR software and ecosystem components manually.
  - Configuring the Cluster
    This section contains information on configuring MapR clusters.
  - Setting Up the Client
    Describes how to set up and use interfaces to a MapR cluster from a client computer.
- Installing MapR-XD
  Describes how to install MapR-XD software with or without the MapR Installer.
- Installing MapR in the Cloud
  Provides an overview of MapR cloud installer capabilities.
- Upgrading MapR or MEP Components
  Depending on your current configuration, you may choose to upgrade the MapR version (MapR Core), ecosystem components, clients, or MapR Monitoring components.
- Migrating to MapR
  Provides instructions for migrating business-critical data and applications from an Apache Hadoop cluster to a MapR cluster.
- Applying a Patch
  You can apply a patch by using the MapR Installer, by using the command line (a manual process), or by using a MapR Installer Stanza.

Software

In order to run MapR software and Hadoop, you must install certain software on your node.

Java

MapR core requires the Java Development Kit (JDK). Installing only the Java runtime environment (JRE) is not sufficient. Verify that one of the following JDK versions is installed on the node:

Java Requirements for MapR Core

Sun Java JDK 1.7 or 1.8
OpenJDK 1.7 or 1.8

NOTE: Make sure you have the development kit installed. Some JRE packages include jdk in the name, but do not provide the required JDK software.

Special Requirements for Using OpenJDK

If you use OpenJDK:

RedHat/CentOS must have java-<version>-openjdk-devel installed.
SUSE nodes must have java-<version>-openjdk-devel installed.
Ubuntu nodes must have openjdk-<version>-jdk installed.

NOTE: The openjdk-devel package and openjdk-7-jdk package include the jps command that lists running Java processes and can show whether the CLDB has started. This command is not supported in the Sun Java JRE.

To install the Oracle/Sun Java JDK:

Obtain the Oracle/Sun Java Development Kit (JDK), available at Oracle's Java SE website. Find Java SE 7 in the archive of previous versions.

To install or update OpenJDK

Use a package manager, such as yum (RedHat, Oracle Linux, or CentOS), apt-get (Ubuntu) or zypper (SUSE).

On RedHat, Oracle Linux, or CentOS:
```
# yum install java-1.7.0-openjdk-devel
```
On Ubuntu:
```
# apt-get install openjdk-7-jdk
```

SUSE

# zypper install java-1_7_0-openjdk-devel

MySQL

The MapR Metrics service, which provides metrics for MapReduce (MRv1), requires access to a MySQL server running version 5.1 or later. MySQL does not have to be installed on a node in the cluster, but it must be on the same network as the cluster. If you do not plan to use MapR Metrics, MySQL is not required.