Forcing LSF to execute jobs on different hosts












1














I have a setup consisting from 3 workers and a management node, which I use for submitting tasks. I would like to execute concurrently a setup script at all workers:



bsub -q queue -n 3 -m 'h0 h1 h2' -J "%J_%I" mpirun setup.sh


As far as I understand, I could use 'ptile' resource constraint to force execution at all workers:



bsub -q queue -n 3 -m 'h0 h1 h2' -J "%J_%I" -R 'span[ptile=1]' mpirun setup.sh


However, occasionally I face an issue that my script got executed several times at the same worker.



Is it expected behavior? Or there is a bug in my setup? Is there a better way for enforcing multi worker execution?






lsf







share|improve this question



























    1














    I have a setup consisting from 3 workers and a management node, which I use for submitting tasks. I would like to execute concurrently a setup script at all workers:



    bsub -q queue -n 3 -m 'h0 h1 h2' -J "%J_%I" mpirun setup.sh


    As far as I understand, I could use 'ptile' resource constraint to force execution at all workers:



    bsub -q queue -n 3 -m 'h0 h1 h2' -J "%J_%I" -R 'span[ptile=1]' mpirun setup.sh


    However, occasionally I face an issue that my script got executed several times at the same worker.



    Is it expected behavior? Or there is a bug in my setup? Is there a better way for enforcing multi worker execution?






    lsf







    share|improve this question

























      1












      1








      1







      I have a setup consisting from 3 workers and a management node, which I use for submitting tasks. I would like to execute concurrently a setup script at all workers:



      bsub -q queue -n 3 -m 'h0 h1 h2' -J "%J_%I" mpirun setup.sh


      As far as I understand, I could use 'ptile' resource constraint to force execution at all workers:



      bsub -q queue -n 3 -m 'h0 h1 h2' -J "%J_%I" -R 'span[ptile=1]' mpirun setup.sh


      However, occasionally I face an issue that my script got executed several times at the same worker.



      Is it expected behavior? Or there is a bug in my setup? Is there a better way for enforcing multi worker execution?






      lsf







      share|improve this question













      I have a setup consisting from 3 workers and a management node, which I use for submitting tasks. I would like to execute concurrently a setup script at all workers:



      bsub -q queue -n 3 -m 'h0 h1 h2' -J "%J_%I" mpirun setup.sh


      As far as I understand, I could use 'ptile' resource constraint to force execution at all workers:



      bsub -q queue -n 3 -m 'h0 h1 h2' -J "%J_%I" -R 'span[ptile=1]' mpirun setup.sh


      However, occasionally I face an issue that my script got executed several times at the same worker.



      Is it expected behavior? Or there is a bug in my setup? Is there a better way for enforcing multi worker execution?






      lsf




      lsf






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked Nov 12 '18 at 7:48









      CaptainTrunky

      9452918




      9452918
























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          Your understanding of span[ptile=1] is correct. LSF will only use 1 core per host for your job. If there aren't enough hosts based on the -n then the job will pend until something frees up.




          However, occasionally I face an issue that my script got executed
          several times at the same worker.




          I suspect that its something with your script. e.g., LSF appends to the stdout file by default. Use -oo to overwrite.






          share|improve this answer





















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            Your understanding of span[ptile=1] is correct. LSF will only use 1 core per host for your job. If there aren't enough hosts based on the -n then the job will pend until something frees up.




            However, occasionally I face an issue that my script got executed
            several times at the same worker.




            I suspect that its something with your script. e.g., LSF appends to the stdout file by default. Use -oo to overwrite.






            share|improve this answer


























              1














              Your understanding of span[ptile=1] is correct. LSF will only use 1 core per host for your job. If there aren't enough hosts based on the -n then the job will pend until something frees up.




              However, occasionally I face an issue that my script got executed
              several times at the same worker.




              I suspect that its something with your script. e.g., LSF appends to the stdout file by default. Use -oo to overwrite.






              share|improve this answer
























                1












                1








                1






                Your understanding of span[ptile=1] is correct. LSF will only use 1 core per host for your job. If there aren't enough hosts based on the -n then the job will pend until something frees up.




                However, occasionally I face an issue that my script got executed
                several times at the same worker.




                I suspect that its something with your script. e.g., LSF appends to the stdout file by default. Use -oo to overwrite.






                share|improve this answer












                Your understanding of span[ptile=1] is correct. LSF will only use 1 core per host for your job. If there aren't enough hosts based on the -n then the job will pend until something frees up.




                However, occasionally I face an issue that my script got executed
                several times at the same worker.




                I suspect that its something with your script. e.g., LSF appends to the stdout file by default. Use -oo to overwrite.







                share|improve this answer












                share|improve this answer



                share|improve this answer










                answered Nov 12 '18 at 18:00









                Michael Closson

                703612




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