Administering Platform LSF - SAS

Adjusting LIM Parameters
RUNWINDOW parameter
Chapter 37
Tuning the Cluster
There are two main goals in adjusting LIM configuration parameters: improving
response time, and reducing interference with interactive use. To improve
response time, tune LSF to correctly select the best available host for each job.
To reduce interference, tune LSF to avoid overloading any host.
LIM policies are advisory information for applications. Applications can either
use the placement decision from LIM, or make further decisions based on
information from LIM.
Most of the LSF interactive tools use LIM policies to place jobs on the network.
LSF uses load and resource information from LIM and makes its own placement
decisions based on other factors in addition to load information.
Files that affect LIM are lsf.shared, lsf.cluster.cluster_name, where
cluster_name is the name of your cluster.
LIM thresholds and run windows affect the job placement advice of LIM. Job
placement advice is not enforced by LIM.
The RUNWINDOW parameter defined in lsf.cluster.cluster_name
specifies one or more time windows during which a host is considered
available. If the current time is outside all the defined time windows, the host
is considered locked and LIM will not advise any applications to run jobs on
the host.
Administering Platform LSF 483