Jimmy -- 

     Let me push back a little -- it is fine to run 1 core/node if there is some good reason. My experience with talking to some of the chemist is that they were not at all IO bound or memory bound, and they could easily get 12 to 14 jobs per node with good efficiency. There are jobs queued and waiting to run now, while 14 nodes have been running with 1 core for 17 or 72 hours. 

     I do not think it is that hard to run multiple jobs per node, and if there is no reason not to, it should be done. 

     I agree, there are a whole lot of legitimate reasons for 1 core jobs. However, in my experience, when I have asked people, their jobs were often (not always!) able to be run together on a single core. 

Jamie 

On Tue, Dec 6, 2016 at 3:16 PM, Raeder, Joachim <j.raeder@unh.edu> wrote:

Core envy!

No, this is perfectly acceptable use.  There is a whole lot of legitimate uses for one core jobs.
We will definitely not micro manage that unless there is some abuse suspected.
I’m a whole lot more worried about people running 50 node jobs for days without checking 
properly, and then have to throw away everything (or worse keep it  on the disk!), just because
we are so blessed and it costs nothing.  If anything, we have to change that.

—  Jimmy

--------------------------------------------------------------------------------------------------
Joachim (Jimmy) Raeder
Professor of Physics, Department of Physics & Space Science Center
University of New Hampshire
245G Morse Hall, 8 College Rd, Durham, NH 03824-3525
voice: 603-862-3412  mobile: 603-502-9505  assistant: 603-862-1431
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On Dec 6, 2016, at 12:24 PM, Gorby, Matthew <Matthew.Gorby@unh.edu> wrote:

Hello Trillian Users,

I'm seeing a lot of one node, one proc / node jobs running at the moment.  If this is just the way "qstat -a" displays a type of run I'm not familiar then please excuse this email.  If those jobs really are what they appear to be then may we have one of the admins chime in on this issue?  I'd like to know if that is an acceptable use of Trillian's resources.  If not, it would be really great to have the other 31/32 of those procs available.

Thanks,

-Matt

 
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