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7.5.0 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.
Ecosystem Components
The following sections provide information about each open-source project that is supported by the HPE Ezmeral Data Fabric.
Apache Drill
Drill-on-YARN

HPE Ezmeral Data Fabric – Customer-Managed 7.5.0 Documentation

7.5.0 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
    - Drill Tutorial
    - Drill-on-YARN
      - Drill-on-YARN Overview
      - Configuring Drill to Run Under YARN
      - Migrate Drill to Run Under YARN
        Explains how to migrate Drill to run under YARN instead of the Warden service.
      - Additional Drill-on-YARN Configuration Options
      - Multiple Drill Clusters within YARN
      - Drill-on-YARN Command Line Tool
      - Application Master Web UI
      - Drill-on-YARN Limitations
      - Configuring Drill-on-Yarn on a Secure Cluster
        Describes how to enable SASL for Drill and SQLLine to run Drill-on-YARN in a secure cluster.
    - Configuring Drill
      Lists the data-fabric-specific configuration for Drill.
    - Working with Drill
    - Securing Drill
      An administrator can install Drill with the default security configuration or manually configure custom security for Drill.
    - Drill Drivers
      HPE Ezmeral Data Fabric provides Drill ODBC and JDBC drivers that you can download and use to connect Drill to BI tools. The drivers are updated periodically to include support for new functionality in Drill.
    - Drill Configuration Files
      The Drill installation includes configuration files with start-up options that you can modify prior to starting Drill.
    - Mask Sensitive Data in Query Logs and Profiles
      Starting in Drill 1.20.2 (EEP 9.0.0 installed on Core 7.1.0), you can define a set of rules in a JSON file to mask sensitive data in Drill query logs and query profiles.
    - Monitoring Drill Metrics
    - Optimizing Queries with Indexes
      HPE Ezmeral Data Fabric Database provides a highly scalable key-value database platform on which you can run SQL queries using Drill. As of the 6.0 release of the MapR Data Platform, HPE Ezmeral Data Fabric Database natively supports indexes on secondary fields in JSON tables.
    - Drill Limitations
      Provides information about Drill limitations and solutions where applicable.
    - Vulnerability Reports
      Provides vulnerability information in relation to 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.
  - 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.

Drill-on-YARN

You can install and run Drill under Warden or you can install and run Drill under YARN. YARN (Yet Another Resource Negotiator) is a cluster management tool that automates the resource sharing process in a cluster.

NOTE: The MapR default security feature introduced in 6.0 is not supported with Drill-on-YARN.

The following sections provide information about Drill-on-YARN, including overview material, installation and configuration instructions, and additional information related to Drill-on-YARN: