MapR 5.1 is at End of Life (EOL) and no longer supported. Please see the latest documentation. This documentation is not being updated.

5.1 Reference
This section provides information about development content including MapR-FS and MapReduce development topics and reference content.
- Development Guide
- Reference Guide
  - MapR Control System
  - Hadoop Commands
  - HBase Shell for MapR-DB
    You can manage MapR-DB tables using HBase shell commands and additional HBase shell commands included in the MapR distribution of Hadoop.
  - YARN commands
  - maprcli and REST API Syntax
  - Alarms Reference
  - Utilities
  - Default MapR Configurations
  - Configuration Files
  - MapR Environment
  - MapR Parameters
  - Best Practices
  - Language Support for MapR-DB Tables
  - Glossary
    This section contains defintions for commonly used terms in MapR Converged Data Platform environments.
  - Source Code for MapR Software
- Glossary
  This section contains defintions for commonly used terms in MapR Converged Data Platform environments.

taskcontroller.cfg

The file /opt/mapr/hadoop/hadoop-<version>/conf/taskcontroller.cfg specifies TaskTracker configuration parameters. The parameters should be set the same on all TaskTracker nodes. See also Secured TaskTracker.

Parameter	Value	Description
mapred.local.dir	/tmp/mapr-hadoop/mapred/local	The local MapReduce directory.
hadoop.log.dir	/opt/mapr/hadoop/hadoop-0.20.2/bin/../logs	The Hadoop log directory.
mapreduce.tasktracker.group	root	The group that is allowed to submit jobs.
min.user.id	-1	The minimum user ID for submitting jobs: Set to `0` to disallow `root` from submitting jobs Set to `1000` to disallow all superusers from submitting jobs
banned.users	(not present by default)	Add this parameter with a comma-separated list of usernames to ban certain users from submitting jobs