HPE Ezmeral Data Fabric 6.2 is In Maintenance and transitions to "End of Maintenance" in June 2024. Please see the latest documentation.

About Release 6.2
This site contains documentation for HPE Ezmeral Data Fabric release 6.2 including installation, configuration, administration, and reference content, as well as content for the associated bundled ecosystem components and drivers.
6.2 Installation
This section contains information about installing and upgrading HPE Ezmeral Data Fabric software. It also contains information about how to migrate data and applications from an Apache Hadoop cluster to a HPE Ezmeral Data Fabric cluster.
6.2 Data Fabric
HPE Ezmeral Data Fabric is the industry-leading data platform for AI and analytics that solves enterprise business needs.
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 Namespace 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 ACEs 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
      - Setting up a Mirroring Schedule for a Mirror Volume
        Explains how to set up a mirroring schedule for a mirror volume using the Control System, the CLI, or the REST API.
      - Changing the Limit for Concurrent Mirror Operations Using the CLI
      - Pushing Changes to Mirrors Using the CLI
      - Moving Large Amounts of Data to a Remote Cluster Using the CLI
      - Disabling Mirror Throttling Using the CLI
      - Recovering Volumes from Mirrors Using the CLI
        Lists the process to recover mirror volumes, using the CLI.
      - Starting the Mirror
        Explains how to start a mirror operation using either the Control System or the CLI.
      - Stopping the Mirror
        Explains how to stop a mirror operation using either the Control System or the CLI.
      - Viewing Mirror Status
        List mirror volumes and their status using the Control System and the CLI.
      - Using Promotable Mirrors for Disaster Recovery
    - 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
    - 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 Managed 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 HPE Ezmeral Data Fabric gateway mediates one-way communication between a source HPE Ezmeral Data Fabric cluster and a destination cluster. You can replicate HPE Ezmeral Data Fabric Database tables (binary and JSON) and HPE Ezmeral Data Fabric Streams streams. HPE Ezmeral 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 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.
6.2 Development
This section contains information related to application development for Ezmeral ecosystem components and HPE Ezmeral Data Fabric products, including the file system, Database (Key-Value and JSON), and Event Streams.
Other Docs
This section contains release-independent information, including: Installer documentation, Ecosystem release notes, interoperability matrices, security vulnerabilities, and links to other data-fabric version documentation.
Glossary
Definitions for commonly used terms in MapR Converged Data Platform environments.

Starting the Mirror

Explains how to start a mirror operation using either the Control System or the CLI.

About this task

When a mirror starts, all the data in the source volume is copied into the mirror volume. Starting a mirroring operation requires the mirror volume to exist and be associated with a source. After you start a mirror, synchronize it with the source volume regularly to keep the mirror current.

NOTE The getIPTypeForCluster method in CLDBRpcCommonUtils is unable to determine whether the IP type is internal or external, if mapr-clusters.conf contains both internal and external IPs. The fix is to only put in the internal IP in mapr-clusters.conf and keep the external IP in the env.sh file, before starting the mirror.

Starting the Mirror for Multiple Mirror Volumes Using the Control System

About this task

To start mirroring, in the Summary tab under Data > Volumes:

NOTE The Summary tab is under the Volumes tab in the Kubernetes version of the Control System.

Procedure

Select the mirror volume(s) to synchronize.
You cannot start mirror for:
- Standard volumes
- Mirror volumes currently mirroring
Select Start Mirroring from the Actions drop-down menu.
The Start Mirroring Volume(s) confirmation dialog displays.
Verify the list of volumes to synchronize and click Start Mirroring.
When a mirror is started, the mirror volume is synchronized from a hidden internal snapshot so that the mirroring process is not affected by any concurrent changes to the source volume. The changes to the mirror volume occur atomically at the end of the mirroring process; deltas transmitted from the source volume do not appear until mirroring is complete.

Starting the Mirror for a Mirror Volume Using the Control System

About this task

To start mirroring:

Procedure

Go to the volume information page for the mirror volume to synchronize.
Select Start Mirroring from the Select Action drop-down menu.
The Start Mirroring Volume confirmation dialog displays.
Click Start Mirroring.
When a mirror is started, the mirror volume is synchronized from a hidden internal snapshot so that the mirroring process is not affected by any concurrent changes to the source volume. The changes to the mirror volume occur atomically at the end of the mirroring process; deltas transmitted from the source volume do not appear until mirroring is complete.

Starting the Mirror Using the CLI or REST API

About this task

The basic command to start a mirror is:

maprcli volume mirror start -name <volume name>

For complete reference information, see volume mirror start.