Platform LSF Administration Guide Version 6.2

Chapter 9
Understanding Resources
Administering Platform LSF
207
Shared resources
Shared resources are configured resources that are not tied to a specific host, but are
associated with the entire cluster, or a specific subset of hosts within the cluster. For
example:
◆ Floating licenses for software packages
◆ Disk space on a file server which is mounted by several machines
◆ The physical network connecting the hosts
LSF does not contain any built-in shared resources. All shared resources must be
configured by the LSF administrator. A shared resource may be configured to be
dynamic or static. In the above example, the total space on the shared disk may be static
while the amount of space currently free is dynamic. A site may also configure the shared
resource to report numeric, string or Boolean values.
An application may use a shared resource by running on any host from which that
resource is accessible. For example, in a cluster in which each host has a local disk but
can also access a disk on a file server, the disk on the file server is a shared resource, and
the local disk is a host-based resource. In contrast to host-based resources such as
memory or swap space, using a shared resource from one machine affects the availability
of that resource as seen by other machines. There will be one value for the entire cluster
which measures the utilization of the shared resource, but each host-based resource is
measured separately.
The following restrictions apply to the use of shared resources in LSF products.
◆ A shared resource cannot be used as a load threshold in the Hosts section of the
lsf.cluster.cluster_name file.
◆ A shared resource cannot be used in the loadSched/loadStop thresholds, or in
the STOP_COND or RESUME_COND parameters in the queue definition in the
lsb.queues file.
Viewing shared resources for hosts
Run bhosts -s to view shared resources for hosts. For example:
% bhosts -s
RESOURCE TOTAL RESERVED LOCATION
tot_lic 5 0.0 hostA hostB
tot_scratch 00 0.0 hostA hostB
avail_lic 2 3.0 hostA hostB
avail_scratch 100 400.0 hostA hostB
The TOTAL column displays the value of the resource. For dynamic resources, the
RESERVED column displays the amount that has been reserved by running jobs.
solaris Operating system Solaris operating system
frame Available software FrameMaker license
Resource Name Describes Meaning of Example Name