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.

zoo.cfg

The file /opt/mapr/zookeeper/zookeeper-3.4.5/conf/zoo.cfg specifies ZooKeeper configuration parameters.

Example

# The number of milliseconds of each tick
tickTime=2000
# The number of ticks that the initial 
# synchronization phase can take
initLimit=20
# The number of ticks that can pass between 
# sending a request and getting an acknowledgement
syncLimit=10
# the directory where the snapshot is stored.
dataDir=/var/mapr-zookeeper-data
# the port at which the clients will connect
clientPort=5181
# max number of client connections
maxClientCnxns=100

WARNING: maxClientCnxns limits the number of concurrent ZooKeeper connections that a single client machine may make. This value does not set a limit for the whole cluster. The default is 100. If you plan to run more than 100 jobs from a single node, increase this value.