Static parameters
In this example we show how to run our program with parameters if these parameters are static and can be coded into the submission script. Perhaps not very useful, but here it goes anyway...
Once our job completes, the output is:
~/ $ cat SingleCoreVariablesJob.o4656 Started: 2012-10-16 18:51:31 Finished: 2012-10-16 18:51:41 Host: iln28 User: akrevl My arguments: ['/afs/cs.stanford.edu/u/akrevl/tutorial/SingleCoreVariables/SingleCoreVariables.py', 'myarg1', 'myarg2', 'myarg3']
-V: using environment variables
What if we would like to pass arguments along with the qsub command? We can try a script like this:
However if we try to run the qsub with our three arguments it will complain that we have supplied wrong arguments (actually it just prints out the usage information, but we should take the hint).
~/ $ qsub -V $HOME/tutorial/SingleCoreVariables/SingleCoreVariables.qsub.sh myarg1 myarg2 myarg3 usage: qsub [-a date_time] [-A account_string] [-b secs] [-c [ none | { enabled | periodic | shutdown | depth=<int> | dir=<path> | interval=<minutes>}... ] ...
Instead of passing arguments by the command line, we can pass them as environment variables. Let's export our arguments first:
Now let's make the adjustments to the submission script. We need to use qsubargX (you can download the script here SingleCoreVariables.qsub.sh):
Let's try and submit this to the cluster (do not forget the -V switch):
qsub -V /afs/cs.stanford.edu/u/akrevl/tutorial/SingleCoreVariables/SingleCoreVariables.qsub.sh
qsub made sure that all the environment variables were passed to the execution node and our program ran with the provided arguments.
~/ $ cat SingleCoreVariablesJob.o4657 Started: 2012-10-16 19:21:13 Finished: 2012-10-16 19:21:23 Host: iln28 User: akrevl My arguments: ['/afs/cs.stanford.edu/u/akrevl/tutorial/SingleCoreVariables/SingleCoreVariables.py', 'myarg1', 'myarg2', 'myarg3']
-v: listing the variables
Another way of passing the arguments to qsub is to just list them as key=value pairs. Let's keep the submission script we used in the previous example (you can download the script here SingleCoreVariables.qsub.sh):
We can list the argument values as part of the qsub command using the -v switch (we could actually omit the -V switch, but we just got used to it, so why bother):
qsub -V -v qsubarg1="myarg1",qsubarg2="myarg2",qsubarg3="myarg3" /afs/cs.stanford.edu/u/akrevl/tutorial/SingleCoreVariables/SingleCoreVariables.qsub.sh
qsub made sure that the specified arguments were available on the execution node and our program used them as you can see in the following listing:
~/ $ cat SingleCoreVariablesJob.o4658 Started: 2012-10-16 19:28:55 Finished: 2012-10-16 19:29:05 Host: iln28 User: akrevl My arguments: ['/afs/cs.stanford.edu/u/akrevl/tutorial/SingleCoreVariables/SingleCoreVariables.py', 'myarg1', 'myarg2', 'myarg3']