[torqueusers] how to config 8-core machine

Josh Butikofer josh at clusterresources.com
Fri Jan 19 11:45:56 MST 2007

What is the output of "pbsnodes -a" show you? It should let you know how many compute nodes TORQUE
believes exist and how many processors are available for launching jobs (np=<x>).

It sounds like TORQUE thinks there are more than 8 processors available, so it starts the 12 jobs.
With two 8-core machines I would personally find this desirable: setting up the head node and the
other computer as two compute nodes would allow you to run 16 processes simultaneously.

Joshua Butikofer
Cluster Resources, Inc.

josh at clusterresources.com
Voice: (801) 717-3707
Fax:   (801) 717-3738

Wim Fournier wrote:
> Hi list,
> I have 2 8-core machines which I want to feed a huge list of jobs. I
> want both boxes to run 8 items from this list as much as possible.
> I have Torque 2.0.0p11 installed. The master runs on one of the boxes.
> If I add the local box to the list of nodes, it sees it has 8 cores.
> Now if I schedule 12 jobs (echo "sleep 30"|qsub), I see that only one
> process runs at any given time. So I added the property np=8 to the node
> config with qmgr. Now if I repeat my experiment, all 12 processes are
> started at the same time..
> What am I doing wrong?
> Kind regards,
> Wim
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