[Beowulf] Varying performance across identical cluster nodes.

Prentice Bisbal pbisbal at pppl.gov
Mon Feb 19 07:48:06 PST 2018

Finally catching up months and months of beowulf e-mails.

On 09/18/2017 05:20 AM, HÃ¥kon Bugge wrote:
>> On 18 Sep 2017, at 03:09, Christopher Samuel <samuel at unimelb.edu.au> wrote:
>> On 15/09/17 04:45, Prentice Bisbal wrote:
>>> I'm happy to announce that I finally found the cause this problem: numad.
>> Very interesting, it sounds like it was migrating processes onto a
>> single core over time!  Anything diagnostic in its log?
> Any idea how this correlates with NFSroot  vs. local disk?

Yes. The local disk wasn't configured exactly like the NFSroot. The 
NFSroot image had numad enabled, and the local disk install did not.

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