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.
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.
- Application Development Process
  Before you start developing applications on the MapR Data Platform 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.
- MapR XD and Apps
  The following sections provide information about accessing the MapR XD with C and Java applications.
- MapR Database and Apps
  This section contains information about developing client applications for JSON and key-value tables.
- MapR Event Store For Apache Kafka and Apps
  MapR Event Store For Apache Kafka brings integrated publish and subscribe messaging to MapR Data Platform.
- MapReduce and Apps
  This section contains information associated with developing YARN applications.
- MapR Data Science Refinery
  The MapR Data Science Refinery product is an easy-to-deploy and scalable data science toolkit with native access to all platform assets and superior out-of-the-box security.
- MapR Data Fabric for Kubernetes
  This section describes how to leverage the capabilities of the MapR Data Fabric for Kubernetes.
- Ecosystem Components
  The following sections provide information about each open-source project that is supported by the MapR Data Platform.
  - Ezmeral Ecosystem Packs
  - 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 MapR Warden service.
      - Additional Drill-on-YARN Configuration Options
        Mapping of drill-env.sh to drill-on-yarn.conf 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
        If you intend to run Drill on YARN on a secure cluster, you must manually enable SASL for the Apache ZooKeeper client.
    - Configuring Drill
      Lists the MapR-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.
    - Monitoring Drill Metrics
    - Optimizing Queries with Indexes
      MapR 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, MapR 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.
  - Flume
  - HBase
  - HBase Client and MapR Database Binary Tables
  - HCatalog
  - Hive
  - HttpFS
  - Hue
  - Impala
  - Livy
    Apache Livy is primarily used to provide integration between Hue and Spark.
  - MapR Event Store For Apache Kafka Clients and Tools
    Describes the supported MapR Event Store For Apache Kafka tools and clients.
  - S3 Gateway
    The S3 gateway is a service that provides an S3-compatible interface to expose data in MapR Data Platform as objects. The S3 gateway manages all inbound S3 API requests to put data into and get data out of cloud storage.
  - Myriad
  - Oozie
  - Pig
  - Sentry
  - Apache Spark
  - Sqoop
  - YARN
  - Zeppelin
- Maven and MapR
  This section discusses topics associated with Maven and MapR.
- Developer's Reference
  This section contains in-depth information for the developer.
- API Documentation
  MapR Data Platform supports public APIs for MapR File System, MapR Database, and MapR Event Store For Apache Kafka. These APIs are available for application-development purposes.
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.

Mapping of drill-env.sh to drill-on-yarn.conf Options

When you run Drill as a standalone application, you set startup options, such as Drillbit memory, in the $DRILL_HOME/conf/drill-env.sh start up script. Under YARN, Drill still reads $DRILL_SITE/drill-env.sh for configuration options, however Drill-on-YARN provides the $DRILL_SITE/drill-on-yarn.conf file to configure options that were formerly set in drill-env.sh.

The following table maps the drill-env.sh environment variables to their equivalent configuration parameters in drill-on-yarn.conf:

drill-env.sh Environment Variable	drill-on-yarn.conf Configuration Parameter
DRILL_MAX_DIRECT_MEMORY *	drill.yarn.drillbit.max-direct-memory
DRILL_HEAP *	drill.yarn.drillbit.heap
DRILL_JAVA_OPTS	drill.yarn.drillbit.vm-args (Added to those in drill-env.sh.)
SERVER_GC_OPTS (to add GC logging)	Drill.yarn.drillbit.log-gc (To enable GC logging)
DRILL_HOME	Set automatically when files are localized (drill.yarn.drill-install. localize is true), else drill.yarn.drill-install. drill-home.
DRILL_CONF_DIR	Set automatically when files are localized, else uses the normal defaults.
DRILL_LOG_DIR	Set automatically to point to YARN’s log directory unless disabled by setting drill.yarn.drillbit. disable-yarn-logs to false. If disabled, uses the normal Drill defaults.
DRILL_CLASSPATH_PREFIX *	Drill.yarn.drillbit. prefix-class-path
HADOOP_CLASSPATH *	drill.yarn.hadoop.class-path (or, better drill.yarn.drillbit. extn-class-path.)
HBASE_CLASSPATH *	Drill.yarn.hadoop. hbase-class-path (or, better drill.yarn.drillbit. extn-class-path.)
EXTN_CLASSPATH * (New in Drill 1.8.)	Drill.yarn.drillbit. extn-class-path
DRILL_CLASSPATH *	drill.yarn.drillbit.class-path