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

Setting Quota for a Volume

About this task

You can set quotas for a volume using MCS and the CLI.

Setting Quota for a Volume Using the MapR Control System

About this task

To set volume quotas, in the Summary tab under Data > Volumes:

Procedure

Ensure that the Usage column is displayed in the Volumes pane.
If necessary, customize the columns to see the Usage column.
Click the Set Quota link associated with the volume for which you want to set quotas.
The Set Quota dialog displays.
Specify the following:
1. Hard quota, which raises an alarm when the threshold is reached and prevents further writes.
2. Advisory quota, which raises an alarm when the threshold is reached, but does not prevent further writes.
NOTE: Both, advisory and hard, quotas can be expressed in megabytes (MB), gigabytes (GB), which is the default, or terabytes (TB). Advisory quota cannot be greater than hard quota.
Click Save Changes for the changes to take effect.

Setting Quota for a Volume Using the CLI or the REST API

About this task

You can set quotas for a volume when creating a new or modifying an existing volume.

The basic command to set quota for a volume is:

maprcli volume create -name <volName> -path <mountPath> -advisoryquota <advisoryQuota> -quota <hardQuota>

maprcli volume modify -name <volName> -advisoryquota <advisoryQuota> -quota <hardQuota>

Send a request of type POST. For example:

curl -k -X POST 'https://<hostname>:8443/rest/volume/create?name=<volName>&path=<mountPath>&advisoryquota=<advisoryQuota>&quota=<hardQuota>' --user mapr:mapr

curl -k -X POST 'https://<hostname>:8443/rest/volume/modify?name=<volName>&advisoryquota=<advisoryQuota>&quota=<hardQuota>' --user mapr:mapr

For the complete list of required and optional parameters, see volume create and volume modify.