Administering Platform LSF - SAS

Handling Input and Output Files
Handling Input and Output Files
LSF provides methods for coordinating individual input and output files for the
multiple jobs created when submitting a job array. These methods require your
input files to be prepared uniformly. To accommodate an executable that uses
standard input and standard output, LSF provides runtime variables (%I and
%J) that are expanded at runtime. To accommodate an executable that reads
command line arguments, LSF provides an environment variable
(LSB_JOBINDEX) that is set in the execution environment.
Methods ◆ “Redirecting Standard Input and Output” on page 335
◆ “Passing Arguments on the Command Line” on page 336
Preparing input files
LSF needs all the input files for the jobs in your job array to be located in the
same directory. By default LSF assumes the current working directory (CWD);
the directory from where bsub was issued. To override CWD, specify an
absolute path when submitting the job array.
Each file name consists of two parts, a consistent name string and a variable
integer that corresponds directly to an array index. For example, the following
file names are valid input file names for a job array. They are made up of the
consistent name input and integers that correspond to job array indices from
1 to 1000:
input.1, input.2, input.3, ..., input.1000
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Administering Platform LSF