CERN P1 is back in full force on WLCG


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Message boards : Science : CERN P1 is back in full force on WLCG

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sgaboinc
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Message 3507 - Posted: 20 Dec 2015, 18:08:15 UTC

CERN P1 is back in full force on WLCG showing large number of jobs running recently

http://atlasathome.cern.ch/atlas_job.php


something 'big' is going to happen at LHC, ATLAS soon? :)

lancone
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Message 3697 - Posted: 8 Feb 2016, 11:20:32 UTC - in response to Message 3507.

Hello,

CERN-P1 stands for our online farm at ATLAS (LHC Point 1),
it is used for simulation when LHC is not running.

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Profile Harm Joris ten Napel
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Message 5126 - Posted: 29 Aug 2016, 23:25:13 UTC - in response to Message 3507.

But nothing seems to beat OLCF, does that mean BOINC is in direct competition with Titan supercomputer at Oak Ridge?

David Cameron
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Message 5128 - Posted: 30 Aug 2016, 7:24:45 UTC - in response to Message 5126.

I wouldn't say competition exactly :)

In ATLAS we work hard to exploit all kinds of resources we can in addition to the regular Grid sites, for example:

- CERN-P1 is the high level trigger farm, when ATLAS is not taking data we can use it for simulation
- OLCF as you say is the Titan supercomputer where we have an official allocation and also run opportunistically when free nodes are available
- BOINC is ATLAS@Home and you guys :)

Profile Harm Joris ten Napel
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Message 5130 - Posted: 30 Aug 2016, 9:32:06 UTC - in response to Message 5128.

Hi David,

thanks for your answer, this is very interesting, of course it's a joint effort but the idea of competition has driven a lot of folks to contribute more resources, so if for example we would say to 'beat Titan' that may be some incentive.

Another question: since Titan is a hybrid system with AMD CPU's and Nvidia GPU's, does ATLAS on Titan make use of the GPU's ?

greetings,

Harm

Profile Harm Joris ten Napel
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Message 5249 - Posted: 8 Sep 2016, 16:55:06 UTC - in response to Message 5130.

I think the answer is 'no' as I don't see it mentioned anywhere and it would probably be a heck of a job (if not impossible) to adapt the science applications to CUDA. Also incidentally the Titan must have recently been tasked with other jobs so ATLAS can no longer opportunistically make use of a very large slice of processing power on that all telling stats page at http://atlasathome.cern.ch/atlas_job.php and in fact BOINC is now processing the largest volume as compared to any other site including CERN-P1.

Message boards : Science : CERN P1 is back in full force on WLCG