6.0 Administration
This section describes how to manage the nodes and services that make up a cluster.
- Administering Users and Clusters
- Administering Nodes
- Administering Volumes
  This section provide information about how to organize and manage data using volumes, a unique feature of MapR clusters.
  - Managing Data with Volumes
  - Managing Snapshots
    This section provide information about managing snapshots.
  - Managing User Disk Usage
  - Managing Schedules
- 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

Viewing Active Volume Alarms

About this task

You can view volume alarms in MCS and using the CLI.

Viewing Active Volume Alarms in the MapR Control System

Procedure

Log in to MCS and:

Click Data > Volumes to view all active volume alarms in the Active Alarms pane.
Go to the Summary tab in the volume information page to view the recent and active alarms for the selected volume in the Alarms pane.
Click (in the top navigation bar) and select Volume Alarms from the drop-down menu in the All alarms pane to view all the active volume alarms.
Click Overview and select Volume Alarms from the drop-down menu in the Active Alarms pane to view all active volume alarms.

You can:

View information related to the alarm.
Dismiss an alarm.
Mute an alarm.

See Volume Alarms for more information on the volume alarms.

Retrieving Active Volume Alarms Using the CLI or REST API

About this task

The basic command to retrieve node alarms is:

maprcli alarm list -cluster <cluster name> -type volume

For complete reference information, see alarm list.