[Beowulf] How to debug slow compute node?

[mathog]

(Sorry for the duplicate of this went out with the wrong subject.)

On 12-Aug-2017 Chris Samuel <samuel at unimelb.edu.au> wrote:

> Just to add to the excellent suggestions from others: have you compared 
> BIOS/
> UEFI settings & versions across these nodes to ensure they're 
> identical?

Also verify that the CR2032 on the motherboard is in working order.
Usually this can be done with "sensors" or "ipmitool" which shows it
with a value near 3.3v  If the motherboard battery fails the settings
can change, and not always to the default
BIOS values.  Unfortunately Dell servers rarely expose this
information with either of those tools but other manufacturers often
do.

Regards,

David Mathog
mathog at caltech.edu
Manager, Sequence Analysis Facility, Biology Division, Caltech