HPE Ezmeral Data Fabric 6.1.x is In Maintenance and transitions to "End of Maintenance" in June 2024. Please see the latest documentation.

About MapR 6.1
This site contains the main documentation for Version 6.1 of the MapR Converged Data Platform, including installation, configuration, administration, and reference information.
6.1 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.
6.1 MapR Data Platform
MapR Data Platform is the industry-leading data platform for AI and analytics that solves enterprise business needs.
6.1 Administration
This section describes how to manage the nodes and services that make up a cluster.
- Administering Users and Clusters
  Lists topics that help manage a MapR cluster.
- Administering Nodes
  Provides a synopsis of managing nodes in a cluster.
  - Managing Nodes
    Describes the Nodes page on the Control System.
  - Managing Roles
    Describes how to manage roles on a node.
  - Managing Services
    Synopsis on managing services.
  - Managing Disks
    Provides a brief overview of adding and removing disks from the MapR file system.
    - Viewing the List of Disks
      Explains how to view the disks on a node using either the Control System or the CLI.
    - Setting Up Disks for MapR
      This section describes how to set up disks during the normal installation process. Go to the ReferenceGuide/disksetup.html command page for information about other uses of this command.
    - Adding Disks to MapR File System
      Describes how to add disks using either the Control System or the CLI.
    - Removing Disks from the File System
      Explains how to remove disks using either the Control System or the CLI.
    - Determining the Amount of Free Disk From the Command-Line
      Lists the command to display the amount of free disk space.
    - Tolerating Slow Disks
      Explains how to tune disk response timeouts.
    - Formatting Disks on a Node From the Command-line
      Provides an overview of the disksetup script to format disks from the command line.
    - Handling Disk Failures
      Explains how to handle disk failures.
    - Designating NICs for MapR
      Explains how to assign IP address blocks for MapR.
    - Working with a Logical Volume Manager
      Explains the role and usage of a Logical Volume Manager.
    - Tuning for SSDs
      Lists the parameters to tune for optimal SSD performance.
- Administering Volumes
  This section provide information about how to organize and manage data using volumes, a unique feature of MapR clusters.
- Administering Files and Directories
- Administering Tables
  Administration of the MapR Database is done primarily via the command line (maprcli) or with the Managed Control System (MCS). Regardless of whether the MapR Database table is used for binary files or JSON documents, the same types of commands are used with slightly different parameter options. MapR Database administration is associated with tables, columns and column families, and table regions.
- Administering Streams
- Administering MapR Gateways
  A MapR gateway mediates one-way communication between a source MapR cluster and a destination cluster. You can replicate MapR Database tables (binary and JSON) and MapR Event Store For Apache Kafka streams. MapR gateways also apply updates from JSON tables to their secondary indexes and propagate Change Data Capture (CDC) logs.
- Administering Services
- Monitoring the Cluster
  This section describes how to monitor the health and performance of a MapR cluster.
- Configuring Security
  Describes how to configure security and manage secure clusters.
- Managing Secure Clusters
  Provides procedures that will enable you to use MapR clusters securely.
- Administering the MapR Data Access Gateway
  The MapR Data Access Gateway is a service that acts as a proxy and gateway for translating requests between lightweight client applications and the MapR cluster. This section describes considerations when upgrading the service, how to modify configuration settings, and how to administer and manage the service.
- Planning for High Availability
- Administrator's Reference
  This section contains in-depth reference information for the administrator.
- Troubleshooting Cluster Administration
  Lists the common errors and their solutions.
- Best Practices for Backing Up MapR Information
  Lists the best practices and performance considerations to follow when backing up MapR information.
6.1 Development
This section contains information related to application development for Ezmeral ecosystem components and MapR Data Platform products, including the file system, Database (Key-Value and JSON), and Event Streams.
Other Docs
This section contains release-independent information, including: MapR Installer documentation, Ecosystem release notes, interoperability matrices, security vulnerabilities, and links to other MapR version documentation.
Glossary
Definitions for commonly used terms in MapR Converged Data Platform environments.

Adding Disks to MapR File System

Describes how to add disks using either the Control System or the CLI.

About this task

You can add disks to MapR File System using the Control System and the CLI. Before adding the disks to MapR File System, add the physical disks to the node or nodes according to the correct hardware procedure.

If you are removing and replacing failed disks, you must install the replacements, then re-add the replacement disks to MapR File System, along with the other disks that were in the same storage pool(s) as the failed disks. See Handling Disk Failures for more details.
If you are removing disks but not replacing them, you can just re-add the other disks that were in the same storage pool(s) as the failed disks.

NOTE Disks must be added on CLDB nodes one node at a time when Warden and MapR services are running.

ATTENTION Disable write caching on all MapR disks if the disks are not battery backed.

Adding Disks Using the Control System

About this task

Complete the following steps to add disks of type MapR File System using the Control System:

Procedure

Log in to the Control System and go to the Summary tab in the node information page.
NOTE The Nodes page is not available on the Kubernetes version of the Control System.
Select the disks not yet added to MapR File System in the Disks pane and click Add Disks to File System.
The Add Disks to File System confirmation dialog displays.
NOTE You cannot select disks of type System to add.
Review the list and click Add Disk.
The disks are automatically formatted and properly-sized storage pools are automatically allocated.

Adding Disks Using the CLI or REST API

About this task

The basic command to add disks to a node is:

maprcli disk add -disks <disk names> -host <host>

NOTE This step reformats the disks. Any data on these disks will be lost.

For complete reference information, see disk add.