3. Installing or Removing Software or Hardware

When the node is stopped, you can add, upgrade or remove software or hardware. At some point after adding or removing services, you should restart Warden, to re-optimize memory allocation among all the services on the node. It is not crucial to perform this step immediately; you can restart Warden any time when the cluster is not busy.

To add or remove individual MapR packages, use the standard package management commands for your Linux distribution:

  • apt-get (Ubuntu)
  • yum (Red Hat or CentOS)

For information about the packages to install, see Planning the Cluster.

The following sections provide information about adding or removing services from a node after it has been deployed in a cluster: