6.0 Administration
This section describes how to manage the nodes and services that make up a cluster.
- Administering Users and Clusters
  - Managing Users and Groups
  - Managing the Cluster
    - Managing Auditing
      Provides instructions for using MapR auditing features.
    - Configuring Balancer Settings
    - Managing Licenses
    - Setting Quota Defaults for Users and Groups
    - Specifying the Location of Gateways
    - Managing Alarms
    - Working with Multiple Instances of the MapR-FS
      The Multi-MapR-FS feature allows multiple instances of the file server to run on a single node in a single process.
    - Converting a Cluster from Root to Non-Root User from the Command-Line
    - Starting Up a Cluster
    - Shutting Down a Cluster
    - Managing Another Unsecure Cluster Using MCS
    - Allocating Cluster Resource from the Command-Line
- Administering Nodes
- 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-DB is done primarily via the command line (maprcli) or with the MapR Control System (MCS). Regardless of whether the MapR-DB table is used for binary files or JSON documents, the same types of commands are used with slightly different parameter options. MapR-DB 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-DB tables (binary and JSON) and MapR-ES 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 MapR 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
- Best Practices for Backing Up MapR Information

Adding a License

About this task

You can add a license through the MapR Control System and using the CLI.

Adding a License Using the MapR Control System

About this task

Complete the following steps to add a license using the MapR Control System:

Procedure

On a machine that is connected to the cluster and to the Internet, perform the following steps to open the MapR Control System:
1. In a browser, view the MapR Control System by navigating to the node that is running the MapR Control System: https:/<webserver>/:8443.
  Your computer won't have an HTTPS certificate yet, so the browser will warn you that the connection is not trustworthy. You can ignore the warning this time.
2. Log in to the MapR Control System as the administrative user you designated earlier.
  Until a license is applied, the MapR Control System dashboard might show some nodes in the amber "degraded" state. Don't worry if not all nodes are green and "healthy" at this stage.
In the MapR Control System, go to Admin > Cluster Settings > Licenses.

Add a license using the following options:

Import License	Allows you to import a license from the server. You must enter your credentials in the Import License window to retrieve your license information.
Upload License	Allows you to upload your license file via browser.
Cut/Paste License	Allows you to copy and paste license key in the Copy and Paste License window.
Get a Free Trial License	Navigates to the MapR licensing form online to get a trial license.

Click Submit.
If the cluster is already registered, the license is applied automatically. Otherwise, go to MapR.com and follow the instructions there to register the cluster.

Adding a License Using the CLI or the REST API

About this task

To add a license from the CLI:

Procedure

Obtain a valid license file from MapR.
Copy the license file to a cluster node.
Run the following command to add the license:
```
maprcli license add [ -cluster <name> ] -license <filename> -is_file true
```
See license add for complete reference information.