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6.0 Installation
This section contains information about installing and upgrading MapR software. It also contains information about how to migrate data and applications from an Apache Hadoop cluster to a MapR cluster.
Migrating to MapR
Provides instructions for migrating business-critical data and applications from an Apache Hadoop cluster to a MapR cluster.
Component Migration
This section describes how to migrate customized components to MapR Hadoop.

MapR 6.0 Documentation

6.0 Installation
This section contains information about installing and upgrading MapR software. It also contains information about how to migrate data and applications from an Apache Hadoop cluster to a MapR cluster.
- Planning the Cluster
  Describes information and factors used in planning your cluster.
- Installing MapR and/or MapR Ecosystem Components
  Describes how to install MapR software and ecosystem components with the MapR Installer or without the MapR Installer.
- Installing the File Migration Service on the Edge Cluster
- Installing MapR-XD
  Describes how to install MapR-XD software with or without the MapR Installer.
- Installing MapR Data Fabric for Kubernetes
  This section describes how to plan for, install, and upgrade the MapR Container Storage Interface (CSI) Storage Plugin and MapR Data Fabric for Kubernetes FlexVolume Driver.
- Installing MapR in the Cloud
  Provides an overview of MapR cloud installer capabilities.
- Upgrading MapR Core 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.
- Setting Up Clients
  Describes how to set up and use interfaces to a MapR cluster from a client computer.
- Setting Up the MapR Control System
  Describes how to configure and access the MapR Control System (MCS).
- Migrating to MapR
  Provides instructions for migrating business-critical data and applications from an Apache Hadoop cluster to a MapR cluster.
  - Planning and Initial Deployment
    There are a number of considerations to take into account before migrating from Apache Hadoop to MapR Hadoop.
  - Component Migration
    This section describes how to migrate customized components to MapR Hadoop.
    - Hive Migration
      You can continue to use Hive tables in a MapR cluster.
  - Application Migration
    Before you migrate your applications to the MapR Hadoop distribution, consider testing your applications using a small subset of data.
  - Data Migration
    After you migrate your applications to the MapR cluster, you can copy your data from the Apache Hadoop HDFS to the MapR cluster.
  - Node Migration
    You can add decommissioned HDFS data nodes to your 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.

Component Migration

This section describes how to migrate customized components to MapR Hadoop.

MapR Hadoop features the complete Hadoop distribution including components such as Hive. There are a few things to know about migrating Hive, or about migrating custom components you have patched yourself.

Custom Components

If you have applied your own patches to a component and wish to continue to use that customized component with the MapR distribution, you should keep the following considerations in mind:

MapR libraries: All Hadoop components must point to MapR for the Hadoop libraries. Change any absolute paths. Do not hardcode hdfs:// or maprfs:// into your applications. This is also true of Hadoop ecosystem components that are not included in the MapR Hadoop distribution (such as Cascading). For more information see Working with MapR-FS.
Component compatibility: Before you commit to the migration of a customized component (for example, customized HBase), check the MapR release notes to see if MapR Technologies has issued a patch that satisfies your business requirements. MapR Technologies publishes a list of Hadoop common patches and MapR patches with each release and makes those patches available for our customers to take, build, and deploy.
ZooKeeper coordination service: Certain components depend on ZooKeeper. When you migrate your customized component from the HDFS cluster to the MapR cluster, make sure it points correctly to the MapR ZooKeeper service.