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.
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.
- 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.
- 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.
  - Ezmeral Ecosystem Packs
  - Apache Airflow
    This topic provides an overview of Apache Airflow on HPE Ezmeral Data Fabric.
  - AsyncHBase
  - Cascading
  - Apache Drill
  - Flume
  - Hadoop
  - HBase
  - HBase Client and HPE Ezmeral Data Fabric Database Binary Tables
  - HCatalog
  - Hive
    - Getting Started with Hive
    - Configuring Hive
    - Integrating Hive
      - Hive and HPE Ezmeral Data Fabric Database Integration
      - Hive and HBase Integration
      - Hive and HPL/SQL Integration
      - Hive and HCatalog Integration
      - Hive and WebHCat Integration
      - Hive and Tez Integration
        You can use Tez, instead of MapReduce, for generic data processing tasks. Tez significantly increases the processing speed. Tez, working with Hive, provides lower latency for interactive queries and higher throughput for batch queries.
        Configuring Hive and Tez
        Known Issues and Restrictions
        SQL Limitations
        Hive-on-Tez User Interface
        Installing the Hive-on-Tez User Interface
        This topic describes installation of the Hive-on-Tez user interface by using the MapR Installer or manual steps.
        Configuring the Timeline Server to Use the Hive-on-Tez User Interface
        This topic describes how to configure the timeline server to use the Hive-on-Tez user interface. This topic includes security configuration information.
        Configuring the Tomcat Server
        This topic describes how to configure and manage the Tomcat server for the Hive-on-Tez user interface.
        Integrating the Hive-on-Tez User Interface with Tez
        This topic describes how to integrate the Hive-on-Tez user interface with Tez.
        Connecting to the Hive-on-Tez User Interface
        This topic describes how to connect to the Hive-on-Tez user interface.
        Hive-on-Tez User Interface Known Issues
        This topic describes known issues that you should be aware of while troubleshooting.
        Tez Shuffle
        Queue Management with Hive-on-Tez
    - Managing Hive Services
    - Connecting to Hive
    - Enabling High Availability for Hive
      This section describes how to enable High Availability for HiveServer2 and HiveMetastore.
    - Hive Features in HPE Ezmeral Data Fabric
      Describes HPE Ezmeral Data Fabric-specific features in Hive.
    - Hive 2.3 API Changes
      This topic describes the public API changes that occurred between Hive 2.1 EEP 5.0.0 and Hive 2.3 EEP 6.0.0.
    - Hive 2.1 API
    - Troubleshooting Hive and Tez
    - Hive Logging
      This section describes Hive logging for Hive 2.1 and later releases and includes information about log splitting.
  - HttpFS
  - Hue
  - Impala
  - 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.
  - S3 Gateway
    The S3 gateway is a service that provides an S3-compatible interface to expose data in HPE Ezmeral Data Fabric as objects. The S3 gateway manages all inbound S3 API requests to put data into and get data out of cloud storage.
  - Oozie
  - Pig
  - Sentry
  - Apache Spark
  - Sqoop
  - YARN
- 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.

Configuring the Timeline Server to Use the Hive-on-Tez User Interface

This topic describes how to configure the timeline server to use the Hive-on-Tez user interface. This topic includes security configuration information.

About this task

When the timeline server is installed using the MapR Installer, the installer secures the timeline server automatically. When you install the timeline server manually, use these steps.

NOTE This procedure assumes that you have previously configured the cluster using the configure.sh script.

Procedure

Run configure.sh -R (on all Hive nodes), replacing <hostname> with the name of your timeline server node:
```
sudo /opt/mapr/server/configure.sh -R -TL <hostname>
```
NOTE Make sure the hostname matches the CN in ssl_keystore for secure clusters. If not, all hive and yarn jobs fail. The hostname can be obtained using the $hostname -f command.

Running configure.sh -R configures the timeline server properties in /opt/mapr/hadoop/hadoop-2.7.0/etc/hadoop/yarn-site.xml for enhanced security.

To use the timeline server with Kerberos, you need to make additional entries to the /opt/mapr/hadoop/hadoop-2.7.0/etc/hadoop/yarn-site.xml file. Replace the following variables with real values:

MAPR_PRINCIPAL
PATH_TO_KEYTAB
HTTP_PRINCIPAL

<property>
  <name>yarn.timeline-service.principal</name>
  <value>MAPR_PRINCIPAL</value>
</property>
<property>
<name>yarn.timeline-service.keytab</name>
  <value>PATH_TO_KEYTAB</value>
</property>
<property>
  <name>yarn.timeline-service.http-authentication.kerberos.principal</name>
  <value>HTTP_PRINCIPAL</value>
</property>
<property>
 <name>yarn.timeline-service.http-authentication.kerberos.keytab</name>
 <value>PATH_TO_KEYTAB</value>
</property>

Restart the resource manager:

maprcli node services -name resourcemanager -action restart -nodes <hostname>