HPE Ezmeral Data Fabric 6.1.x is In Maintenance and transitions to "End of Maintenance" in June 2024. Please see the latest documentation.

About MapR 6.1
This site contains the main documentation for Version 6.1 of the MapR Converged Data Platform, including installation, configuration, administration, and reference information.
6.1 Installation
This section contains information about installing and upgrading MapR software. It also contains information about how to migrate data and applications from an Apache Hadoop cluster to a MapR cluster.
6.1 MapR Data Platform
MapR Data Platform is the industry-leading data platform for AI and analytics that solves enterprise business needs.
6.1 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 MapR 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 MapR clusters.
  - Managing Data with Volumes
    Provides an overview of how to manage volume data.
  - Managing Snapshots
    This section provide information about managing snapshots.
  - Managing User Disk Usage
  - Managing Schedules
  - Managing Tiers
    - Enabling Tiering
      Describes how to enable data tiering using both the Control System and the CLI.
    - Creating a Storage Tier
      Describes how to create a sotrage tier using the Control System and the CLI.
    - Viewing the List of Tiers
      Describes how to view the list of tiers using the Control System, the CLI, and the REST API.
    - Editing a Tier
      Describes how to modify a cold tier using the Control System, the CLI and the REST API.
    - Specifying a Tier
      Describes how to associate a tier with a tiering-enabled volume using the Control System and the CLI.
    - Removing a Tier
      Describes how to remove a tier that is not associated with a tier, using the Control System, the CLI and the REST API.
  - Managing Storage Policies
- Administering Files and Directories
- Administering Tables
  Administration of the MapR Database is done primarily via the command line (maprcli) or with the Managed Control System (MCS). Regardless of whether the MapR Database table is used for binary files or JSON documents, the same types of commands are used with slightly different parameter options. MapR Database 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 Database tables (binary and JSON) and MapR Event Store For Apache Kafka 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 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
  Lists the common errors and their solutions.
- Best Practices for Backing Up MapR Information
  Lists the best practices and performance considerations to follow when backing up MapR information.
6.1 Development
This section contains information related to application development for Ezmeral ecosystem components and MapR Data Platform products, including the file system, Database (Key-Value and JSON), and Event Streams.
Other Docs
This section contains release-independent information, including: MapR Installer documentation, Ecosystem release notes, interoperability matrices, security vulnerabilities, and links to other MapR version documentation.
Glossary
Definitions for commonly used terms in MapR Converged Data Platform environments.

Removing a Tier

Describes how to remove a tier that is not associated with a tier, using the Control System, the CLI and the REST API.

About this task

For a primer on Data Tiering, see Data Tiering.

You can remove a tier that is not associated with a volume, using the Control System, the CLI, and REST API. In the Control System, a cold tier is referred to as remote target and you can only remove remote targets (or cold tiers) using the Control System. Use the CLI or REST API to remove cold and warm tiers.

Removing a Remote Target Using the Control System

Procedure

Log in to the Control System and click Data > Volumes > Remote Targets to display the list of remote targets.
Select the checkbox associated with the tier to delete.
Selecting the checkbox associated with a tier makes the Remove Target button available.
Click Remote Target to display the Remove Remote Target confirmation dialog.
Verify the list of remote targets to remove and click Remove.

Removing a Tier Using the CLI and REST API

About this task

Run the following command to remove a tier:

/opt/mapr/bin/maprcli tier remove -name <tier-name>

You cannot remove a tier associated with a volume. If you run the command to remove a tier that is associated with a volume, the command returns an error (shown in bold) similar to the following:

{
   "timestamp":1516771078126,
   "timeofday":"2018-01-23 09:17:58.126 GMT-0800",
   "status":"ERROR",
   "errors":[{
       "id":10003,
        "desc":"Cannot remove tier, as some volumes are still using it."
   }]
}

Send a request of type POST to remove a tier. For example:

curl -k -X POST 'https://abc.sj.us:8443/rest/tier/remove?name=ksTestTier' --user mapr:mapr

You cannot remove a tier associated with a volume. If you send a request to remove a tier that is associated with a volume, an error (shown in bold) similar to the following is returned:

# curl -k -X POST 'https://abc.sj.us:8443/rest/tier/remove?name=ksTestTier' --user mapr:mapr
{"timestamp":1524675381333,"timeofday":"2018-04-25 09:56:21.333 GMT-0700 AM","status":"ERROR","errors":[{"id":10003,"desc":"Can not remove tier, as some volumes are still using it."}]}

For more information, see tier remove.