Before you start, drain the node of data by moving the node to the
/decommissioned physical topology. All the data on a node in the
/decommissioned topology is migrated to volumes and nodes in the
Run the following command to check if a given volume is present on the node:
Run this command for each non-local volume in your cluster to verify that the node being decommissioned is not storing any volume data.
- Change to the root user (or use sudo for the following commands).
- Stop the Warden:
service mapr-warden stop
- If ZooKeeper is installed on the node, stop it:
service mapr-zookeeper stop
- Determine which MapR packages are installed on the node:
dpkg --list | grep mapr(Ubuntu)
rpm -qa | grep mapr(Red Hat or CentOS)
- Remove the packages by issuing the appropriate command for the operating system, followed by the list of services. Examples:
apt-get purge mapr-core mapr-cldb mapr-fileserver(Ubuntu)
yum erase mapr-core mapr-cldb mapr-fileserver(Red Hat or CentOS)
- Remove the
/opt/maprdirectory to remove any instances of
zookeeperleft behind by the package manager.
- Remove any MapR cores in the
- If the node you have decommissioned is a CLDB node or a ZooKeeper node, then run
configure.shon all other nodes in the cluster (see Configuring the Node).