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.
- 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
  - Managing Streams
    This topic provides information about managing streams in HPE Ezmeral Data Fabric Streams.
  - Managing Topics
    Topics are logical collections of messages. The following sections describe how to create and manage topics.
  - Managing Stream Replication
    This section contains topics about setting up stream replication and administering existing replicas.
    - Preparing Clusters for Stream Replication
      Configuring clusters for participation in the replication of HPE Ezmeral Data Fabric Streams streams involves configuring two or more gateways on destination clusters and, if the clusters are secure, setting up secure communications between the clusters.
    - Adding Stream Replicas
      You can create stream replicas using the Control System and the CLI. When you add a replica using the Control System, you can also set up and start replication between a source and replica stream.
    - Setting Up Stream Replication Using the CLI
      Describes how to run the maprcli stream replica autosetup command to set up primary-secondary or multi-master replication from an existing source stream.
    - Viewing the List of Stream Replicas
      Explains how to view the list of replicas for a stream using the Control System and the CLI.
    - Editing a Stream Replica
      Explains how to edit a stream replica using the Control System and the CLI to modify the way in which messages are replicated from the source stream to the replica.
    - Removing Stream Replicas
      Explains how to unregister one or more replicas using the Control System and the CLI.
    - Pausing Stream Replication
      Explains how to pause replication from a source stream to a replica stream using the Control System and the CLI.
    - Resuming Stream Replication
      Explains how to resume replication from one stream to another stream using either the Control System or the CLI.
    - Managing Upstream Sources for Stream Replicas
  - Preparing Clusters for Log Compaction
    Describes how to prepare your environment so you can use log compaction.
  - Mirroring Topics with Apache Kafka MirrorMaker
    Use the Apache Kafka MirrorMaker utility either to mirror topics that are in Apache Kafka clusters to streams that are in HPE Ezmeral Data Fabric clusters or to Mirror topics that are in HPE Ezmeral Data Fabric clusters to Apache Kafka clusters.
  - Mirroring Topics with HPE Ezmeral Data Fabric MirrorMaker 2
    MirrorMaker 2.0 is a multi-cluster, cross-data-center replication engine based on the Kafka Connect framework. MirrorMaker 2 is available starting in EEP 8.0.0.
- 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.

Editing a Stream Replica

Explains how to edit a stream replica using the Control System and the CLI to modify the way in which messages are replicated from the source stream to the replica.

Editing a Stream Replica Using the Control System

About this task

To un-register one or more stream replicas from the Control System:

Procedure

Log in to the Control System and go to the Replication tab in the stream information page.
Click associated with the replica to edit in the Replicas pane.
The Edit Replica page displays.

Make necessary changes to any of the following properties.

Path to Replica	Specify path and name of the replica stream.
Throttle	Enable (Yes) or disable (No) throttling of replication operations. Throttle the replication stream to minimize the impact of the replication process on incoming operations during periods of heavy load. By default, throttling is disabled. Throttling has two effects, both of which allow HPE Ezmeral Data Fabric Streams to use more system resources to process new messages: Throttling slows down the rate at which changes to a stream are replicated. Throttling slows down the rate at which messages to be replicated are read from disk.
Replicate Synchronously	Set up synchronous (Yes) or asynchronous (No) replication.
Encrypt On Wire	Enable (Yes) or disable (No) on-wire encryption. By default, this is disabled (No). If you enable on-wire encryption, the local cluster and any other cluster that is part of the replication process must be enabled for security.
Compress On Wire	Specify type of compression to use when replicating messages.

Click Save Changes for the changes to take effect.

Editing a Stream Replica Using the CLI or REST API

About this task

The basic command to modify a replica is:

stream replica edit -path <stream path> -replica <remote stream path>

For complete reference information, see stream replica edit.