Administering Platform LSF - SAS

Chapter 13
Specifying Resource Requirements
Operators
These operators can be used in selection strings. The operators are listed in
order of decreasing precedence.
Syntax
-a
!a
a * b
a / b
a + b
a - b
a > b
a < b
a >= b
a 50 && type == MIPS) || (swp > 35 && type ==
ALPHA)]
select[((2*r15s + 3*r1m + r15m) / 6 < 1.0) && !fs && (cpuf >
4.0)]
Specifying shared resources with the keyword “defined”
A shared resource may be used in the resource requirement string of any LSF
command. For example when submitting an LSF job which requires a certain
amount of shared scratch space, you might submit the job as follows:
% bsub -R "avail_scratch > 200 && swap > 50" myjob
The above assumes that all hosts in the cluster have access to the shared
scratch space. The job will only be scheduled if the value of the
"avail_scratch" resource is more than 200 MB and will go to a host with at
least 50 MB of available swap space.
It is possible for a system to be configured so that only some hosts within the
LSF cluster have access to the scratch space. In order to exclude hosts which
cannot access a shared resource, the defined(resource_name) function
must be specified in the resource requirement string.
For example:
% bsub -R "defined(avail_scratch) && avail_scratch > 100 &&
swap > 100" myjob
would exclude any hosts which cannot access the scratch resource. The LSF
administrator configures which hosts do and do not have access to a particular
shared resource.
Administering Platform LSF 193