About Release 7.6.1
This site contains documentation for HPE Ezmeral Data Fabric release 7.6.1, including installation, configuration, administration, and reference content, as well as content for the associated ecosystem components and drivers.
7.6.1 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.
7.6.1 Data Fabric
HPE Ezmeral Data Fabric is the industry-leading data platform for AI and analytics that solves enterprise business needs.
7.6.1 Administration
This section describes how to manage the nodes and services that make up a cluster.
7.6.1 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.
- Application Development Process
  Before you start developing applications on the HPE Ezmeral Data Fabric platform, consider how you will get the data into the platform, the storage format of the data, the type of processing or modeling that is required, and how the data will be accessed.
- File Store and Apps
  The following sections provide information about accessing the File Store with C and Java applications.
- HPE Ezmeral Data Fabric Database and Apps
  This section contains information about developing client applications for JSON and key-value tables.
- Apache Kafka Wire Protocol Service
  HPE Ezmeral Data Fabric Streams supports Apache Kafka Wire Protocol Service. Apache Kafka Wire Protocol Service is a TCP/IP service that emulates a Kafka cluster backed by HPE Ezmeral Data Fabric Streams. The service makes it possible for Apache Kafka clients written in any programming language to access topics in HPE Ezmeral Data Fabric Streams.
- HPE Ezmeral Data Fabric Streams and Apps
  HPE Ezmeral Data Fabric Streams brings integrated publish and subscribe messaging to HPE Ezmeral Data Fabric.
- MapReduce and Apps
  This section contains information associated with developing YARN applications.
- Kubernetes Interfaces for Data Fabric
  This section describes how to leverage the capabilities of the Kubernetes Interfaces for Data Fabric.
- Ecosystem Components
  The following sections provide information about each open-source project that is supported by the HPE Ezmeral Data Fabric.
  - Ecosystem Packs
  - Apache Airflow
    This topic provides an overview of Apache Airflow on HPE Ezmeral Data Fabric.
  - AsyncHBase
  - Cascading
  - Apache Drill
  - Hadoop
  - HBase
  - HBase Client and HPE Ezmeral Data Fabric Database Binary Tables
  - HCatalog
  - Hive
  - HttpFS
  - Hue
  - Livy
    Apache Livy is primarily used to provide integration between Hue and Spark.
  - HPE Ezmeral Data Fabric Streams Clients and Tools
    Describes the supported HPE Ezmeral Data Fabric Streams tools and clients.
    - KSQL
      KSQL is an open-source streaming SQL engine that implements continuous, interactive queries.
    - Kafka Streams
      Kafka Streams is a programming library used for creating Java or Scala streaming applications and, specifically, building streaming applications that transform input topics into output topics.
    - Kafka REST Proxy
      The Kafka REST Proxy provides a RESTful interface to HPE Ezmeral Data Fabric Streams clusters to consume and produce messages and to perform administrative operations.
      - Configuration
        This section describes how to configure the Kafka REST Proxy for HPE Ezmeral Data Fabric Streams.
        Configuration Parameters
        This section provides the Kafka REST Proxy for HPE Ezmeral Data Fabric Streams parameters.
        Security Parameters
        Describes Kafka REST security parameters.
        SSL Security Configuration
        Describes how to configure Kafka REST security.
        User Impersonation
        Describes how to disable, enable, and use impersonation with Kafka REST.
        Saving Kafka REST Configurations
        Describes how Kafka REST configurations are saved during an upgrade.
      - Services Management
        The Kafka REST Proxy for HPE Ezmeral Data Fabric Streams service can be started, restarted, and stopped via the maprcli nodes services command or using the REST API equivalent.
      - HTTP Methods and URI Summary
        This section provides HTTP method and URI summaries for multiple Kafka REST Proxy API versions for HPE Ezmeral Data Fabric Streams.
    - Kafka Connect
      Kafka Connect is a utility for streaming data between HPE Ezmeral Data Fabric Streams and other storage systems.
    - Kafka Schema Registry
      Kafka Schema Registry provides a RESTful interface for storing and retrieving schemas.
    - Structured Streaming in Spark
      Starting in EEP 5.0.0, structured streaming is supported in Spark.
  - NiFi
    This topic provides an overview of Apache NiFi on HPE Ezmeral Data Fabric.
  - OTel
    This topic provides an overview of OpenTelemetry on HPE Ezmeral Data Fabric.
  - Ranger
  - Apache Spark
  - YARN
  - Zeppelin
- Maven and the HPE Ezmeral Data Fabric
  This section discusses topics associated with Maven and the HPE Ezmeral Data Fabric.
- Developer's Reference
  This section contains in-depth information for the developer.
- API Documentation
  HPE Ezmeral Data Fabric supports public APIs for file system, HPE Ezmeral Data Fabric Database, and HPE Ezmeral Data Fabric Streams. These APIs are available for application-development purposes.
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.

Configuration

This section describes how to configure the Kafka REST Proxy for HPE Ezmeral Data Fabric Streams.

You can set these configuration parameters in the kafka-rest.properties file. The Control System displays information about the Kafka REST Proxy for the HPE Ezmeral Data Fabric Streams service. By default, the service runs on port 8082.

To install the Kafka REST Proxy, see Installing HPE Ezmeral Data Fabric Streams Tools.

To configure the Kafka REST Proxy for HPE Ezmeral Data Fabric Streams, edit the following file:

/opt/mapr/kafka-rest/kafka-rest-<version>/config/kafka-rest.properties

To view the Kafka REST Proxy for HPE Ezmeral Data Fabric Streams log files, see the following location:

/opt/mapr/kafka-rest/kafka-rest-<version>/logs/kafka-rest.log

NOTE After installation, Warden automatically detects the configuration and starts the service. To configure the Kafka REST Proxy for HPE Ezmeral Data Fabric Streams, stop the service, configure the parameters, and restart the service. To stop and restart services, see maprcli node services. For example:

maprcli node services -name kafka-rest -action stop

https://<host>:8443/rest/node/services?name=kafka-rest&action=stop&nodes=<node_names>

where node_names is the node on which to perform the action; either a list of nodes, or a filter that matches a set of nodes .