About Release 8.0.0
This site contains documentation for HPE Data Fabric release 8.0.0, including installation, configuration, administration, and reference content, as well as content for the associated ecosystem components and drivers.
8.0.0 Installation
This section contains information about installing HPE 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.
8.0.0 Upgrade
This section describes how to upgrade HPE Data Fabric software.
8.0.0 Data Fabric
HPE Data Fabric is the industry-leading data platform for AI and analytics that solves enterprise business needs.
8.0.0 Administration
This section describes how to manage the nodes and services that make up a cluster.
8.0.0 Development
This section contains information related to application development for Ezmeral ecosystem components and HPE 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 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 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 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 Data Fabric Streams. The service makes it possible for Apache Kafka clients written in any programming language to access topics in HPE Data Fabric Streams.
- Model Context Protocol (MCP)
- HPE Data Fabric Streams and Apps
  HPE Data Fabric Streams brings integrated publish and subscribe messaging to HPE 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 Data Fabric.
- Maven and the HPE Data Fabric
  This section discusses topics associated with Maven and the HPE Data Fabric.
- Developer's Reference
  This section contains in-depth information for the developer.
  - HPE Data Fabric Database Shell (JSON Tables)
    The mapr dbshell is a tool that enables you to create and perform basic manipulation of JSON tables and documents. You run dbshell by typing mapr dbshell on the command line after logging into a node in a HPE Data Fabric cluster.
  - Utilities for HPE Data Fabric Database JSON Tables
    HPE Data Fabric Database JSON provides utilities to copy, export, and import data, compare table content, and verify the consistency of secondary indexes.
  - HPE Data Fabric Database HBase Shell (Binary Tables)
    You can manage HPE Data Fabric Database tables using HBase shell commands and additional HBase shell commands included in the HPE Data Fabric distribution of Hadoop.
  - Utilities for HPE Data Fabric Database Binary Tables
    HPE Data Fabric Database provides utilities to copy and compare data in HPE Data Fabric Database binary tables.
  - HPE Data Fabric Streams Utilities
  - YARN Commands
    This section describes the YARN commands.
    - yarn application
      The yarn application lists applications, or prints the status or kills the specified application.
    - yarn classpath
    - yarn daemonlog
    - yarn debugcontrol
      used to save additional DEBUG logs for scheduling in YARN to a separate file without restarting the RM.
    - yarn jar
    - yarn logs
      Dumps the YARN container logs.
    - yarn node
    - yarn queue
    - yarn rmadmin
    - yarn version
  - Source Code for HPE Data Fabric Software
    HPE releases source code to the open-source community for enhancements that HPE has made to the Apache Hadoop project and other ecosystem components.
  - Hadoop Commands
    This section describes the Hadoop commands.
- API Documentation
  HPE Data Fabric supports public APIs for file system, HPE Data Fabric Database, and HPE 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.

yarn debugcontrol

used to save additional DEBUG logs for scheduling in YARN to a separate file without restarting the RM.

The logs are saved in /opt/mapr/Hadoop/Hadoop<version>/logs/yarn-mapr-scheduling-debug.log

Syntax

yarn debugcontrol

Parameters

Parameter	Description
-addapp <application_name>	enables additional scheduling DEBUG on the application
-addqueue <queue_name>	enables additional scheduling DEBUG on the queue
-removeapp <application_name>	disable addition scheduling DEBUG on the application
-removequeue <queue_name>	disable addition scheduling DEBUG on the queue
-getapps	lists the applications with additional scheduling DEBUG
-getqueues	lists the queues with additional scheduling DEBUG

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HPE Data Fabric 8.0.0 Software Documentation
Abstract	This site contains documentation for HPE Data Fabric Software version 8.0.0 including installation, configuration, administration, and reference content, as well as content for the associated bundled ecosystem components and drivers.
Published	December 2025
Edition	8.0.0