This script allows you to generate a lot of jobs using the array-param-file option of oarsub but to execute few of them at a time.

Use this with a notify script that will wake up a new job a soon as one is completed.

./oarhold [NUMBER_OF_CONCURRENT_RUNNING_JOBS]

The default number of concurrent running jobs is set to 50.

This script wakes up a held job whose id is in a file when another job completes.

To use with the oarhold script.

Set the following variables in oarhold:

PROG="/path/to/myprogram"
PROGNAME="somename"
ARRAY_PARAM_FILE="./params.txt"
NOTIFY_SCRIPT="/path/to/oarwake"
JOBS_FILE="/path/to/jobs.txt"
JOBS_LOCK_FILE="/path/to/jobs.lck"

MAX_CONCURRENT_JOBS=50

Set the following variables in oarwake:

JOBS_FILE="/path/to/jobs.txt"
JOBS_LOCK_FILE="/path/to/jobs.lck"
JOBS_LOG_FILE="/path/to/jobs.log"

Ensure that the JOBS_FILE and JOBS_LOCK_FILE are consistent between both scripts.

After configuring both scripts, launch ./oarhold [N] where N is the desired number of concurrent running jobs.

It will create and hold as many instances of PROG required by the ARRAY_PARAM_FILE content. Those jobs will only be scheduled and run N by N.

Each time a job completes, the oarwake script will be triggered, which will schedule the next held job, until all held jobs have been executed.