About Release 7.2
This site contains documentation for HPE Ezmeral Data Fabric release 7.2, including installation, configuration, administration, and reference content, as well as content for the associated ecosystem components and drivers.
7.2 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.
7.2 Data Fabric
HPE Ezmeral Data Fabric is the industry-leading data platform for AI and analytics that solves enterprise business needs.
7.2 Administration
This section describes how to manage the nodes and services that make up a cluster.
7.2 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.
- 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.
  - NiFi
    This topic provides an overview of Apache NiFi on HPE Ezmeral Data Fabric.
  - Ranger
  - Apache Spark
  - YARN
    - ResourceManager
      Describes the role of the ResourceManager.
    - ApplicationMaster
      Describes the role of the ApplicationMaster.
    - MapReduce Version 2
      Provides an overview of how MapReduce works.
    - How Applications Work in YARN
      Describes the data flow during application execution in YARN.
    - Direct Shuffle on YARN
      Explains the shuffle phase of a MapReduce application.
    - Apache Shuffle on YARN
      You can disable Direct Shuffle and enable Apache Shuffle by modifying the configuration options in the yarn-site.xml and mapred-site.xml files. This page describes how to configure Apache Shuffle for MapReduce applications.
    - Logging Options on YARN
      Describes the logging options that are available on YARN.
    - Support for ADLS
      Starting with MapR 6.1, you can use Azure Data Lake Store (ADLS) as a data source or destination for all applications.
    - Configuring ATS 1.0 or 1.5 for Hadoop 3.3
      Describes how to configure the YARN Application Timeline Server (ATS) 1.0 and 1.5 for Hadoop 3.3.
    - Configuring ATS 2.0 for Hadoop 3.3
      Describes how to install and configure the YARN Application Timeline Server (ATS) 2.0 for Hadoop 3.3.
  - 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.

Configuring ATS 2.0 for Hadoop 3.3

Describes how to install and configure the YARN Application Timeline Server (ATS) 2.0 for Hadoop 3.3.

Use these steps:

Install the following packages:

Package	See for more information
`mapr-timelineserver`	Installing Hadoop and YARN
`mapr-hbase`	Install HBase on a Cluster Node
`mapr-hbase-master`
`mapr-hbase-regionserver`

Run the configure.sh script:

/opt/mapr/server/configure.sh -R -TL <FQDN>

Add the property for hbase-site.xml to the yarn-site.xml:

Example for local path:

<property>
    <name>yarn.timeline-service.hbase.configuration.file</name>
    <value>file:/opt/mapr/hbase/hbase-1.4.14/conf/hbase-site.xml</value>
</property>

Example for Data Fabric file system path:

<property>
    <name>yarn.timeline-service.hbase.configuration.file</name>
    <value>maprfs:/tmp/hbase-site.xml</value>
</property>

Create the timeline service schema:

echo "export HBASE_CLASSPATH="/opt/mapr/hadoop/hadoop-3.3.4/share/hadoop/yarn/timelineservice/*"" >> /opt/mapr/hbase/hbase-1.4.14/conf/hbase-env.sh
/opt/mapr/hbase/hbase-1.4.14/bin/hbase org.apache.hadoop.yarn.server.timelineservice.storage.TimelineSchemaCreator -create

Restart all YARN services: RM, NM, JHS, and ATS:

maprcli node services -nodes 'hostname -f' -name resourcemanager -action restart
maprcli node services -nodes 'hostname -f' -name timelineserver -action restart
maprcli node services -nodes 'hostname -f' -name historyserver -action restart
maprcli node services -nodes 'hostname -f' -name nodemanager -action restart

To access the Timeline Server 2.0 web UI, navigate to the following URL:
```
https://<TIMELINEHOSTNAME>:8090/ui2/#/cluster-overview
```