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6.2 Administration
This section describes how to manage the nodes and services that make up a cluster.
Administrator's Reference
This section contains in-depth reference information for the administrator.
Alarms Reference
The pages in this section provide details about all of the types of alarms.
Volume Alarms

HPE Ezmeral Data Fabric 6.2 Documentation

6.2 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 data-fabric cluster.
- Administering Nodes
  Provides a synopsis of managing nodes in a cluster.
- Administering Volumes
  This section provide information about how to organize and manage data using volumes, a unique feature of HPE Ezmeral Data Fabric clusters.
- Administering Files and Directories
- Administering Tables
  Administration of the HPE Ezmeral Data Fabric Database is done primarily via the command line (maprcli) or with the MapR Control System (MCS). Regardless of whether the HPE Ezmeral Data Fabric Database table is used for binary files or JSON documents, the same types of commands are used with slightly different parameter options. HPE Ezmeral Data Fabric Database administration is associated with tables, columns and column families, and table regions.
- Administering Streams
- Administering Data Fabric Gateways
  A data-fabric gateway mediates one-way communication between a source data-fabric cluster and a destination cluster. You can replicate HPE Ezmeral Data Fabric Database tables (binary and JSON) and HPE Ezmeral Data Fabric Event Store streams. Data Fabric 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 Data Access Gateway
  The HPE Ezmeral Data Fabric Data Access Gateway is a service that acts as a proxy and gateway for translating requests between lightweight client applications and the HPE Ezmeral Data Fabric 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.
  - maprcli and REST API Syntax
    This section provides information about the MapR command API. Most commands can be run on the command-line interface (CLI), or by making REST requests programmatically or in a browser.
  - Utilities
    Contains information about various scripts and utilities, that help setup, maintain, and monitor clusters.
  - Configuration Files
    This section contains reference information about various configuration files.
  - Alarms Reference
    The pages in this section provide details about all of the types of alarms.
    - User/Group Alarms
    - Cluster Alarms
    - Node Alarms
    - Table-Replication Alarms
    - Secondary Index Alarms
    - Volume Alarms
      - Compaction Failed
      - Data Unavailable
      - Data Under-Replicated
        Describe the alarm that is triggered when a volume is under replicated.
      - Warm-Tier Data Node Down
        Provides the resolution for the Warm-Tier Data Node Down alarm.
      - Data Under-Encoded
      - Data Below-Parity
      - Offload/Recall Failed
      - Inodes Limit Exceeded
      - Large Row
      - Mirror Failure
      - No Nodes in Topology
      - Snapshot Failure
      - Snapshot Restore Failure
        Describes the alarm that is triggered when the Snapshot Restore operation fails repeatedly.
      - Topology Almost Full
      - Label Almost Full
        The alarm that is triggered when Storage Pools/Nodes with the specified label are running out of space.
      - Topology Full Alarm
      - Label Full Alarm
        The alarm that is triggered when Storage Pools/Nodes with the specified label are completely out of space.
      - Volume Advisory Quota Alarm
      - Volume Become Master Stuck
      - Volume with Non-Local Containers
      - Volume Quota Alarm
  - MapR Environment
    This section provides information associated with the MapR environment.
- Troubleshooting Cluster Administration
  Lists the common errors and their solutions.
- Best Practices for Backing Up HPE Ezmeral Data Fabric Information
  Lists the best practices and performance considerations to follow when backing up HPE Ezmeral Data Fabric information.

Volume Alarms

Volume alarms indicate problems in individual volumes. The following sections describe the data-fabric volume alarms.

(Topic last modified: 2020-09-22)