Central Configuration

Describes the location where you can store customized configuration files, and the pullcentralconfig utility that is used to detect such files.

Each service on a node has one or more configuration files associated with it. The default version of each configuration file is stored locally under /opt/mapr/.

Customized versions of the configuration files are placed in the mapr.configuration volume, which is mounted at:
/var/mapr/configuration
The following diagram illustrates where each configuration file is stored:

MapR uses the pullcentralconfig script to detect customized configuration files in:
/var/mapr/configuration
This script is launched every five minutes by default. When the script finds a customized file, it overwrites the local files in /opt/mapr. First, the script looks for node-specific custom configuration files under:
/var/mapr/configuration/nodes/<hostname>
If the script does not find any configuration files at that location, the script searches for cluster-wide configuration files under: 
/var/mapr/configuration/default
The /default directory stores cluster-wide configuration files that apply to all nodes in the cluster by default.