LSF Version 7.3 - Administering Platform LSF

Installing a Permanent License
162 Administering Platform LSF
◆ LSF_Client
◆ LSF_Float_Client
LSF client hosts are licensed per host, not per CPU, so there is no difference
between licensing a single-processor host and a multi-processor host.
See Floating Client Licenses on page 175 for information about configuring LSF
floating clients.
FLEXlm license server host
A permanent LSF license is tied to the host ID of a particular license server host and
cannot be used on another host.
If you are already running FLEXlm to support other software licenses, you can use
the existing license server host to manage LSF also. In this case, you will add your
Platform LSF license key to the existing FLEXlm license file.
If you are not already using FLEXlm, or prefer to administer LSF license
management separately, you must choose a host to run the license daemons. See
Selecting a license server host on page 162.
It is possible to run multiple license server hosts for failover purposes. See Multiple
FLEXlm License Server Hosts on page 169.
Selecting a license server host
By reading this, you will gain the information needed to make an educated decision
when selecting a license server host.
The FLEXlm license server daemon normally runs on one host. LSF tolerates failure
of the license server daemon for up to 60 hours, as long as the master LIM is not
restarted or shut down.
If you are installing a permanent license, choose a reliable host as the license server
host to ensure that the LSF licenses are always available. LSF cannot run if it cannot
contact the license server daemon. Although the license server host can be an LSF
host, it is usually a host outside of the cluster. The license daemons create very little
load, so they can be run on the host that is the dedicated file server for the
Platform LSF software. This permits the licenses to be available whenever the LSF
software is available.
You should not make the license server host the same as the master host for the
cluster. If you do this, and the master host goes down, the backup master that takes
over will not be able to check license tokens out from the license server daemon on
the original master which has failed.
FLEXlm software for the license server host
Permanent (server-based) LSF licenses work with FLEXlm version 7.2 or later.
If your FLEXlm license server host is of the same host type as one or more LSF
hosts, the FLEXlm software is included in the LSF distribution and automatically
installed under LSF_SERVERDIR, which is a shared directory (so there is no
requirement to copy any software to your FLEXlm license server host; just include
LSF_SERVERDIR in your PATH environment variable on the license server host so
that you can access the files and start the daemons).