rocks linux cluster - adding a new parallel environment

by default rocks ships with a couple of environments, which execute stuff on different nodes. But sometimes you just want to have a node all to your self and take over all it's slots.

Todo this you can just create a new environment and which gives you a defined number of cpus for a specified job.

1. create a file which describes the paralell environment like this

pe_name threaded
slots 999
user_lists NONE
xuser_lists NONE
start_proc_args /bin/true
stop_proc_args /bin/true
allocation_rule $pe_slots
control_slaves FALSE
job_is_first_task TRUE
urgency_slots min
accounting_summary FALSE


2. register this on the head node

qconf -Ap file.txt


3. add it to the list of available envionments

qconf -mq all.q
pe_list make mpich mpi orte threaded


4. test it with qlogin

qlogin -pe threaded 4