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.
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.
- Products Covered in the MapR Data Platform Documentation
  This section lists the products covered in the MapR Data Platform documentation portal and provides links to the related product documentation.
- MapR Installer
  You must download and run the MapR Installer setup script before you can start the MapR Installer web interface or issue MapR Installer Stanza commands.
  - Getting Started with the Installer
    This section describes things you need to do to start using the MapR Installer.
  - Installer Operations
    This section describes operations you can perform using the MapR Installer.
    - Using the Enable MapR Secure Cluster Option
      You use the Enable MapR Secure Cluster option to control whether or not the cluster is configured as a secure cluster.
    - Using the Enable MapR DARE Option
      You use the Enable MapR DARE option to enable data-at-rest encryption for MapR volumes.
    - Configuring Remote Authentication for the Installer
      This page describes how to specify a password or private key that enables the Installer program to perform common operations on all nodes in the cluster.
    - Installing the S3 Gateway Using the Installer
      Using the web-based Installer, you can install the S3 Gateway on the cluster.
    - Installing NFS Using the MapR Installer
      Using the web-based MapR Installer, you can install version 3 or version 4 of the Network File System (NFS) on the cluster.
    - Using Custom Playbooks
      Installer 1.12.0.0 and later enable you to use custom playbooks that can run a set of predefined tasks during or after operations using the MapR Installer or MapR Installer Stanzas.
    - Extending a Cluster by Adding Nodes
      This section describes how to add capacity to a MapR cluster by adding nodes.
    - Using the Incremental Install Function
      Use the Incremental Install function of the web-based MapR Installer to control MapR security, add or upgrade services, upgrade Ezmeral Ecosystem Packs (EEPs), and perform other maintenance functions.
    - Enabling or Disabling Metrics Collection or Logging
      You can use the MapR Installer to enable or disable metrics collection and logging during a new or incremental installation.
    - Using the MapR Subnet and MapR External Advanced Options
      Using the Installer advanced options available under Node Configuration, you can restrict the cluster to a subset of network interface cards (NICs) or specify public IP addresses that can be used with the cluster nodes.
    - Online vs. Offline Operations
      Most MapR Installer operations are offline operations, meaning that the cluster must be brought down in order to perform the operation. But there are some exceptions.
    - Starting Up a Cluster Using the MapR Installer Startup Button
      You can use a single button to start MapR software on a cluster.
    - Shutting Down a Cluster Using the MapR Installer Shutdown Button
      You can use a single button to shut down MapR software on a cluster.
    - Importing or Exporting the Cluster State
      You can use the Import State and Export State commands to upload or download a YAML configuration file (a "Stanza") that describes the state of the cluster.
    - Performing a Maintenance Update
      Perform a maintenance update when you want to upgrade to a new patch version of MapR core or apply a patch.
    - Auto-Provisioning Templates
      Describes the MapR Installer auto-provisioning templates.
    - Understanding Two-Digit and Three-Digit EEPs
      Understanding the differences between the EEP directories on https://package.ezmeral.hpe.com/releases/MEP/ can help you prevent versioning issues.
    - Uninstalling Software Using the MapR Installer Uninstall Button
      You can use a single button to uninstall MapR software on all nodes in the cluster.
  - Installer Troubleshooting
    This section describes how to identify and solve problems when you use the MapR Installer.
  - Installer Release Notes
    This release of the MapR Installer works with RedHat/CentOS, Ubuntu, and SLES.
  - Installer Help Links
    Here are some topics that can help you use the MapR Installer Web Interface.
  - MapR Installer Containers
    This section describes how you can obtain the MapR Installer as a Docker container.
  - MapR Installer Stanzas
    This section describes how to prepare for and use MapR Installer Stanzas to install, upgrade, or uninstall MapR software.
- Interoperability Matrices
  This section provides tables that show the operating system (OS), JDK, ecosystem, and MapR client support for the MapR Data Platform. Check these tables for information about software compatibility.
- MapR Data Science Refinery Release Notes
  This section contains release notes for the MapR Data Science Refinery.
- Ecosystem Component Release Notes
  The following release notes contain information for the components included in the MapR Data Platform.
- Ezmeral Ecosystem Pack (EEP) Reference
  This section contains links to information that is specific to a given EEP.
- Control System Release Notes
  This section contains release notes for the MapR Data Platform Control System.
- MapR Data Fabric for Kubernetes Release Notes
  This section contains release notes for the MapR Data Fabric for Kubernetes.
- Thin Client Release Notes
  This section contains release notes for the lightweight client applications that use the Data Access Gateway to send requests to the MapR Data Platform.
- Support Articles in the HPE Support Center
  MapR support articles moved to the HPE Support Center in 2022, changing the way you find and access the support articles.
- MapR PACC Release Notes
  This section contains release notes for the MapR Persistent Application Client Container (PACC).
- Security Vulnerabilities
  This section describes how to find information about potential security vulnerabilities in software.
- Previous Versions
  This page contains links to the MapR documentation for releases that are currently supported or have recently reached end-of-life.
- MapR Edge
  This section contains information about MapR Edge, which is a small footprint edition of the MapR Data Platform. MapR Edge is designed to capture, process, and analyze IoT data close to the source.
- Product Licensing
  Provides information related to product licensing.
- Other Resources
  This page provides links to additional resources such as on-demand training, videos, blogs, and the MapRMapR Data Platform community.
Glossary
Definitions for commonly used terms in MapR Converged Data Platform environments.

Uninstalling Software Using the MapR Installer Uninstall Button

You can use a single button to uninstall MapR software on all nodes in the cluster.

About this task

The Uninstall button appears on the status page of the MapR Installer web interface when you connect to an installed cluster. The Uninstall button removes MapR software (but does not remove the MapR Installer) from all nodes in the cluster.

NOTE You can also use MapR Installer Stanzas to uninstall software. See Uninstalling MapR Core Using an Installer Stanza.

To use the Uninstall button:

Procedure

Use a browser to connect to the cluster using the MapR Installer URL:
```
https://<Installer Node hostname/IPaddress>:9443
```
On the status screen, click the Uninstall button. The MapR Installer displays the Uninstall screen.
Enter your SSH password and other authentication information as needed, and click Next. The installer begins the uninstall process.