Administering Platform LSF - SAS

Network Floating Licenses
Chapter 18
Managing Software Licenses with LSF
A network floating license allows a fixed number of machines or users to run
the product at the same time, without restricting which host the software can
run on. Floating licenses are cluster-wide resources; rather than belonging to
a specific host, they belong to all hosts in the cluster.
LSF can be used to manage floating licenses using the following LSF features:
◆ Shared resources
◆ Resource reservation
◆ Job requeuing
Using LSF to run licensed software can improve the utilization of the licenses.
The licenses can be kept in use 24 hours a day, 7 days a week. For expensive
licenses, this increases their value to the users. Floating licenses also increase
productivity, because users do not have to wait for a license to become
available.
LSF jobs can make use of floating licenses when:
◆ All license jobs are run through LSF
◆ Licenses are managed outside of LSF control
All licenses used through LSF
Example
lsf.shared
If all jobs requiring licenses are submitted through LSF, then LSF could regulate
the allocation of licenses to jobs and ensure that a job is not started if the
required license is not available. A static resource is used to hold the total
number of licenses that are available. The static resource is used by LSF as a
counter which is decremented by the resource reservation mechanism each
time a job requiring that resource is started.
For example, suppose that there are 10 licenses for the Verilog package
shared by all hosts in the cluster. The LSF configuration files should be
specified as shown below. The resource is a static value, so an ELIM is not
necessary.
Begin Resource
RESOURCENAME TYPE INTERVAL INCREASING DESCRIPTION
verilog Numeric () N (Floating
licenses for Verilog)
End Resource
lsf.cluster.cluster_name
Begin ResourceMap
RESOURCENAME LOCATION
verilog (10@[all])
End ResourceMap
Submitting jobs
The users would submit jobs requiring verilog licenses as follows:
% bsub -R "rusage[verilog=1]" myprog
Administering Platform LSF 281