it10a@it10a:/opt/IT-10$ mpiexec.hydra -f /home/it10a/hosteth0 -n 2 ./hello | tee  mpiexec.hydar_error_log


Usage: ./mpiexec [global opts] [exec1 local opts] : [exec2 local opts] : ...

Global options (passed to all executables):

  Global environment options:
    -genv {name} {value}             environment variable name and value
    -genvlist {env1,env2,...}        environment variable list to pass
    -genvnone                        do not pass any environment variables
    -genvall                         pass all environment variables (default)

  Other global options:
    -f {name}                        file containing the host names
    -wdir {dirname}                  working directory to use


Local options (passed to individual executables):

  Local environment options:
    -env {name} {value}              environment variable name and value
    -envlist {env1,env2,...}         environment variable list to pass
    -envnone                         do not pass any environment variables
    -envall                          pass all environment variables (default)

  Other local options:
    -n/-np {value}                   number of processes
    {exec_name} {args}               executable name and arguments


Hydra specific options (treated as global):

  Bootstrap options:
    -bootstrap                       bootstrap server to use
    -bootstrap-exec                  executable to use to bootstrap processes
    -enable-x/-disable-x             enable or disable X forwarding

  Proxy options (only needed for persistent mode):
    -boot-proxies                    boot proxies to run in persistent mode
    -boot-foreground-proxies         boot foreground proxies (persistent mode)
    -shutdown-proxies                shutdown persistent mode proxies
    -proxy-port                      port for proxies to listen (boot proxies)
    -use-persistent                  use persistent mode proxies to launch

  Communication sub-system options:
    -css                             communication sub-system to use

  Resource management kernel options:
    -rmk                             resource management kernel to use

  Hybrid programming options:
    -ranks-per-proc                  assign so many ranks to each process
    -enable/-disable-pm-env          process manager environment settings

  Process-core binding options:
    -binding                         process-to-core binding mode
    -bindlib                         process-to-core binding library (plpa)

  Checkpoint/Restart options:
    -ckpoint-interval                checkpoint interval
    -ckpoint-prefix                  checkpoint file prefix
    -ckpointlib                      checkpointing library (blcr)
    -ckpoint-restart                 restart a checkpointed application

  Other Hydra options:
    -verbose                         verbose mode
    -info                            build information
    -print-rank-map                  print rank mapping
    -print-all-exitcodes             print exit codes of all processes