Administering Platform LSF - SAS

Usage String
Batch jobs
Chapter 13
Specifying Resource Requirements
This string defines the expected resource usage of the job. It is used to specify
resource reservations for jobs, or for mapping jobs on to hosts and adjusting
the load when running interactive jobs.
By default, no resources are reserved.
The resource usage (rusage) section can be specified at the job level or with
the queue configuration parameter RES_REQ.
Syntax rusage[usage_string [, usage_string] ...]
where usage_string is:
load_index=value [:load_index=value]... [:duration=minutes[m] |
:duration=hoursh | :duration=secondss [:decay=0 | :decay=1]]
Load index
Duration
Internal and external load indices are considered in the resource usage string.
The resource value represents the initial reserved amount of the resource.
The duration is the time period within which the specified resources should be
reserved. Specify a duration equal to or greater than the ELIM updating
interval.
◆ If the value is followed by the letter s, m, or h, the specified time is
measured in seconds, minutes, or hours respectively.
◆ By default, duration is specified in minutes.
For example, the following specify a duration of 1 hour:
❖ duration=60
❖ duration=1h
❖ duration=3600s
Duration is not supported for static shared resources. If the shared resource is defined
in an lsb.resources Limit section, then duration is not applied.
Decay
The decay value indicates how the reserved amount should decrease over the
duration.
◆ A value of 1 indicates that system should linearly decrease the amount
reserved over the duration.
◆ A value of 0 causes the total amount to be reserved for the entire duration.
Values other than 0 or 1 are unsupported. If duration is not specified, decay
value is ignored.
Decay is not supported for static shared resources. If the shared resource is defined
in an lsb.resources Limit section, then decay is not applied.
Default
If a resource or its value is not specified, the default is not to reserve that
resource. If duration is not specified, the default is to reserve the total amount
for the lifetime of the job. The default decay value is 0.
Administering Platform LSF 195