Several compute-intensive commands use OGS/SGE to run portions of the processing in parallel. They submit qsub jobs using your username:

FEAT    will run multiple first-level analyses in parallel if they are setup all together in one GUI setup. At second level, if full FLAME (stages 1+2) is selected then all the slices are processed in parallel.

MELODIC will run multiple single-session analyses (or single-session preprocessing if a multi-session/subject analysis is being done) in parallel if they are setup all together in one GUI setup.

TBSS    will run all registrations in parallel.

BEDPOSTX (FDT) low-level diffusion processing will run all slices in parallel.

FSLVBM  will run all registrations in parallel, both at the template-creation stage and at the final registrations stage.

POSSUM  will process all slices in parallel.

Because they call qsub, YOU MUST RUN THESE COMMANDS ON THE FRONT-END DIRECTLY. That is, call them or the script that calls them from chead directly, without using qlogin or qsub.

If you run one of these commands from a compute node, you'll get an error like this:

denied: host "compute-0-6.local" is no submit host

We are working on a safe way to run these commands from qsub and qlogin.

If your command gets killed because it takes too much CPU time running on chead, email the admin to learn how to work around this. This is very unlikely.

If your jobs are killed because of insufficient memory, it means most likely that the portions run via OGS/SGE are hitting the default memory limit. To request more, do so via the .sqe_request file in your home directory.

NOTE however that this will make the request for all jobs your run, which is an inefficient use of memory for you and everyone else, so be careful to always change this file before running other jobs that don't need as much memory (e.g. simply comment-out or deactivate any lines by adding a hash mark (#) by itself at the beginning of the line in your .sge_request file). I'm hoping to work out a more flexible way to request more memory and will let everyone know if I work it out.