Platform LSF Administration Guide Version 6.2

How LSF Runs Parallel Jobs
Administering Platform LSF
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How LSF Runs Parallel Jobs
When LSF runs a job, the LSB_HOSTS variable is set to the names of the hosts running
the batch job. For a parallel batch job, LSB_HOSTS contains the complete list of hosts
that LSF has allocated to that job.
LSF starts one controlling process for the parallel batch job on the first host in the host
list. It is up to your parallel application to read the LSB_HOSTS environment variable
to get the list of hosts, and start the parallel job components on all the other allocated
hosts.
LSF provides a generic interface to parallel programming packages so that any parallel
package can be supported by writing shell scripts or wrapper programs.