Uninstalling Execution Hosts

During the execution host uninstallation, all configuration information for the targeted hosts is deleted. The uninstallation attempts to stop the exec hosts in a graceful manner. First, the queue instances associated with the target host of the uninstallation will be disabled, so that new jobs will not be started. Then, in sequence, the following actions are done on each running jobs: checkpoint the job; reschedule the job; do forced rescheduling of the job. At this point, the queue instance will be empty, and the execution daemon will be shut down, then the configuration, global spool directory or local spool directory will be removed.

The configuration file template has a section for identifying hosts that can be uninstalled automatically. Look for this section:

# Remove this execution hosts in automatic mode 
EXEC_HOST_LIST_RM="host1 host2 host3 host4"

Every host in the EXEC_HOST_LIST_RM list will be automatically removed from the cluster.

To start the automatic uninstallation of execution hosts, type the following command:

% ./inst_sge -ux -auto full-path-to-configuration-file