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6.2 Administration
This section describes how to manage the nodes and services that make up 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.
Managing Data with Volumes
Provides an overview of how to manage volume data.
Working with Tiered Volumes
Running the Compactor Using the CLI and REST API

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.
  - Managing Data with Volumes
    Provides an overview of how to manage volume data.
    - Viewing the List of Volumes
      Explains how to view the list of volumes either through the Control Panel or the CLI.
    - Creating a Volume
      Describes how to create a volume using the Control System, CLI and the REST API.
    - Viewing Volume Information
      Describes how to view volume information using either the Control System or the CLI.
    - Removing Volumes
      Explains how to remove a volume using either the Control System or the CLI.
    - Modifying Multiple Volumes
      Explains how to modify volumes using either the Control System or the CLI.
    - Modifying a Volume
      Describes how to edit volume properties using the Control System, CLI and the REST API.
    - Renaming a Volume
      Describes how to rename a volume using the Control System, CLI or the REST API.
    - Manage a Label
      Describes how to apply a storage label to a volume using the Control System.
    - Manage a Name Space Label
      Describes how to apply a label to a namespace container of a volume using the Control System.
    - Specifying Volume Inheritance Using the CLI
      Lists volume properties that can be inherited from other volumes.
    - Setting Data ACEs
      Describes how to set ACE expressions using both the GUI and the CLI.
    - Changing or Setting Mount Information for a Volume
      Describes how to set the mount path for a volume using either the Control System, the CLI, or the REST API.
    - Changing Volume Type
    - Selecting a Replication Type for High Availability
      Describes replication types for high-availability clusters, and the tradeoffs of using them.
    - Setting or Modifying Quota for a Volume
      Describes how to set or modify a quota for a volume.
    - Migrating a Volume off a Node Using the CLI
    - Setting Up Volume Topology
      Specifies how to use volume topology to place volumes on specific racks, nodes, or groups of nodes.
    - Viewing Active Volume Alarms
      Describes how to view volume alarms using the Control System and the CLI.
    - Working with Mirror Volumes
    - Enabling and Restricting Access to Tenant Volume and Data
      Describes how to restrict access to tenant volumes in a multi-tenant environment.
    - Working with Tiered Volumes
      - Erasure Coding Scheme for Data Protection and Recovery
        Describes the erasure coding (EC) schemes for data protection and recovery.
      - Specifying a Schedule for Offloading Data
        Explains how to create a schedule for automatic offloading of data, using the Control System, the CLI and the REST API.
      - Creating a Tiering-Enabled Volume
      - Associating a Tier and/or Tiering Rule with a Volume
      - Determining if a Volume is Enabled for Tiering
      - Offloading a Volume to a Tier
        Explains how to offload a volume to a tier using either the Control System, the CLI, or the REST API.
      - Recalling a Volume to filesystem
        Explains how to recall offloaded data to the filesystem.
      - Viewing the List of Running Jobs
      - Terminating a Running Volume-Level Tiering Job
        Describes how to terminate a volume-level tiering job using either the Control System or the CLI.
      - Retrying Failed Operation
      - Running the Compactor Using the CLI and REST API
      - Retrieving the Status of a Volume-level Tiering Operation
      - Retrieving Tiering Statistics Using guts
        Explains how to use the guts utility to retrieve tiering statistics.
      - Moving back end Volume from the Command Line
    - Using Volume Links for Read and Write Operations
  - Managing Snapshots
    This section provide information about managing snapshots.
  - Managing User Disk Usage
  - Managing Schedules
  - Managing Tiers
  - Managing Storage Policies
  - Using Storage Labels
    Describes the Storage Labels feature.
- 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.
- 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.

Running the Compactor Using the CLI and REST API

You can trigger the compactor using the CLI and REST API to purge recalled data on the MapR cluster or to purge stale data on the tier. See Data Compaction for more information.

Running the Compactor to Purge Recalled Data on the MapR Cluster

CLI
REST

Run the following command to trigger the compactor and purge data whether or not the expiry time for recalled data has been reached:

maprcli volume compact -name <volName> -forcerecallexpiry true

Send a request of type POST. For example:

curl -k -X POST 'https://<host>:8443/rest/volume/compact?name=<volName>&forcerecallexpiry=true' --user mapr:mapr

For more information, see volume compact.

Running the Compactor to Purge Stale Data on the Tier

CLI
REST

Run the following command to trigger the compactor:

maprcli volume compact -name <volName>

Send a request of type POST.

curl -k -X POST 'https://<host>:8443/rest/volume/compact?name=<volName>' --user mapr:mapr

When you trigger the compactor, the compactor purges stale data from the tier and also recalled data on the MapR cluster if the expiry time for recalled data has been reached. For more information, see volume compact.

(Topic last modified: 2018-06-26)