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6.0 Administration
This section describes how to manage the nodes and services that make up a cluster.
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.
Managing Table Replication
This section contains topics about setting up table replication and administering existing replicas.
Adding Table Replicas

MapR 6.0 Documentation

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.
- 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.
  - Managing Tables
    MapR-DB supports two types of table: binary tables and JSON tables. This section covers how to create, edit, and delete tables, as well as how to set parameter values, display parameter values, grant permissions and access, replicate tables, and more using the MapR Control System and the CLI.
  - Managing Column Families and Columns
    This section covers overviews of column families in binary tables and JSON tables, how to create column families, alter them, delete them, set permissions on them, and set and display parameter values.
  - Managing Table Replication
    This section contains topics about setting up table replication and administering existing replicas.
    - Preparing Clusters for Table Replication
      Preparing clusters for table replication includes configuring gateways on destination clusters, configuring the mapr-clusters.conf file on the source cluster, and, if the clusters are secure, setting up secure communications between the clusters. After you prepare the clusters for table replication, you can setup replication between tables.
    - Setting Up Table Replication Using the CLI
      You can run the maprcli table replica autosetup command to set up master-slave or multi-master replication from an existing source table.
    - Adding Table Replicas
      - Adding JSON Table Replicas
      - Adding Binary Table Replicas
    - Displaying the List of Table Replicas
    - Modifying Table Replica
    - Removing Table Replicas
    - Pausing Table Replication
    - Resuming Table Replication
    - Adding a Column Family to a Replica
      Changes to the structure of a source table are not automatically replicated to replica table. You must complete the following steps to add a column family to a replica.
    - Viewing Active Table Replication Alarms
    - Managing Upstream Source for Table Replicas
  - Managing Secondary Indexes
    Describes how to manage secondary indexes, including adding, deleting, and listing indexes, setting up your cluster for querying, and troubleshooting index usage.
  - Administering Change Data Capture
    This topic covers the MCS and maprcli tools for managing the Change Data Capture (CDC) feature.
  - Indexing MapR-DB Binary Tables with Elasticsearch
    As of with MapR 6.0, MapR-DB Elastic Search integration capability is deprecated and no longer available in the MapR-DB product.
- 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

Adding Table Replicas

About this task

You can register a MapR-DB binary or JSON table as a replica of another MapR-DB binary or JSON table using MCS and CLI. When you add a replica using the MCS, you can also setup and start replication between a source MapR-DB Binary or JSON table to a replica MapR-DB Binary or JSON table. Before you begin, complete the steps to prepare MapR clusters for table replication.

Adding Table Replica Using the MapR Control System

About this task

To replicate a table:

Procedure

Log in to MCS and go to the Replication tab in the table information page.
Click Add Replica and follow the steps for:
- Adding JSON Table Replicas
- Adding Binary Table Replicas
Click Add Replica.

Adding Table Replica Using the CLI or the REST API

About this task

To add a replica, run the following command:

maprcli table replica add -path <table path> -replica <replica table path>

To run this command, your user ID must have the following permissions:

readAce and writeAce on both the source volume and the target volume
lookupdir on directories in the paths of both tables
readperm and replperm permissions on the source table

For complete reference information, see table replica add.

NOTE: You also have the option to setup table replication with

maprcli
                            table replica autosetup

which will setup and start replication. For more information, see Setting Up Table Replication Using the CLI.