[Halld-offline] reminder: discussion of Batch Farm Change: PBS to Slurm on June 3rd

[Mark Ito]

remember the informal discussion opportunity today at 10:00am in CEBAF 
Center room F224.



-------- Forwarded Message --------
Subject: 	[Jlab-scicomp-briefs] Batch Farm Change: PBS to Slurm on June 3rd
Date: 	Mon, 20 May 2019 20:15:50 +0000
From: 	Bryan Hess <bhess at jlab.org>
To: 	jlab-scicomp-briefs at jlab.org <jlab-scicomp-briefs at jlab.org>



The farm has been gradually migrating to the Slurm workload manager over 
the past few months, replacing the legacy PBS system. We are planning 
the final transition of farm nodes for Tuesday, June 3rd. For most users 
this will not be a significant change because the primary submission 
mechanism for the farm will continue to be Auger or SWIF.

There are a few differences in the way Slurm behaves that surfaced 
during this transition when some SWIF workflows were redirected to 
Slurm. Most notably, Slurm directs standard output and standard error to 
volatile space where it will be automatically cleaned after 2 months. 
Very large stdout/stderr may be cleaned up after two weeks.Job 
stdout/stderr is visible on hosts mounting Lustre at /farm_out/<username>.

The Slurm farm nodes are currently running CentOS 7.2. They will be 
updated to 7.6 once the Slurm migration has been completed. This will be 
a subsequent change announced in advance.

To address questions about this change and the farm, we are scheduling 
an informal discussion opportunity for next Tuesday, May 28th at 10:00am 
in CEBAF Center room F224. Incident reports are also welcome for 
specific issues.

Detailed documentation about submitting to Slurm today is available at 
https://scicomp.jlab.org/docs/auger_slurm


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