Administering Platform LSF - SAS

About Resource Requirement Strings
About Resource Requirement Strings
Most LSF commands accept a -R res_req argument to specify resource
requirements. The exact behaviour depends on the command. For example,
specifying a resource requirement for the lsload command displays the load
levels for all hosts that have the requested resources.
Specifying resource requirements for the lsrun command causes LSF to select
the best host out of the set of hosts that have the requested resources.
A resource requirement string describes the resources a job needs. LSF uses
resource requirements to select hosts for remote execution and job execution.
Resource requirement string sections
Which sections
apply
Syntax
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A selection section (select). The selection section specifies the criteria for
selecting hosts from the system.
An ordering section (order). The ordering section indicates how the hosts
that meet the selection criteria should be sorted.
A resource usage section (rusage). The resource usage section specifies
the expected resource consumption of the task.
A job spanning section (span). The job spanning section indicates if a
parallel batch job should span across multiple hosts.
A same resource section (same). The same section indicates that all
processes of a parallel job must run on the same type of host.
Depending on the command, one or more of these sections may apply. For
example:
◆ bsub uses all sections
◆ lshosts only selects hosts, but does not order them
◆ lsload selects and orders hosts
◆ lsplace uses the information in select, order, and rusage sections to
select an appropriate host for a task
◆ lsloadadj uses the rusage section to determine how the load
information should be adjusted on a host
select[selection_string] order[order_string]
rusage[usage_string [, usage_string] ...] span[span_string]
same[same_string]
The square brackets must be typed as shown.
The section names are select, order, rusage, span, and same. Sections that
do not apply for a command are ignored.
If no section name is given, then the entire string is treated as a selection string.
The select keyword may be omitted if the selection string is the first string in
the resource requirement.
Each section has a different syntax.
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Administering Platform LSF