Platform LSF Administration Guide Version 6.2

Chapter 4
Working with Hosts
Administering Platform LSF
103
Removing a Host
Removing a host from LSF involves preventing any additional jobs from running on the
host, removing the host from LSF, and removing the host from the cluster.
CAUTION
Never remove the master host from LSF. If you want to remove your current
default master from LSF, change
lsf.cluster.cluster_name to assign a
different default master host. Then remove the host that was once the
master host.
1 Log on to the LSF host as root.
2 Run badmin hclose to close the host. This prevents jobs from being dispatched
to the host and allows running jobs to finish.
3 When all dispatched jobs are finished, run lsfshutdown to stop the LSF
daemons.
4 Remove any references to the host in the Host section of
LSF_CONFDIR/lsf.cluster.cluster_name.
5 Remove any other references to the host, if applicable, from the following LSF
configuration files:
❖ LSF_CONFDIR/lsf.shared
❖ LSB_CONFDIR/lsb.hosts
❖ LSB_CONFDIR/lsb.queues
6 Log off the host to be removed, and log on as root or the primary LSF
administrator to any other host in the cluster.
7 Run lsadmin reconfig to reconfigure LIM.
8 Run badmin mbdrestart to restart mbatchd.
9 If you configured LSF daemons to start automatically at system startup, remove the
LSF section from the host’s system startup files.
10 If any users of the host use lstcsh as their login shell, change their login shell to
tcsh or csh. Remove lstcsh from the /etc/shells file.