Using the CMS High Level Trigger as a Cloud Resource

20th International Conference on Computing in High Energy and Nuclear Physics

物理学;计算机科学

Colling, David^1 ; Huffman, Adam^1 ; McCrae, Alison^2 ; Lahiff, Andrew^3 ; Grandi, Claudio^4 ; Cinquilli, Mattia^2 ; Gowdy, Stephen^2 ; Coarasa, Jose Antonio^2 ; Tiradani, Anthony^5 ; Ozga, Wojciech^2 ; Chaze, Olivier^2 ; Sgaravatto, Massimo^6 ; Bauer, Daniela^1

Imperial College London, South Kensington Campus, London

SW7 2AZ, United Kingdom^1

CERN, Geneve 23

CH-1211, Switzerland^2

STFC, Rutherford Appleton Laboratory, Oxfordshire, Didcot

OX11 0QX, United Kingdom^3

INFN, Viale Berti-Pichat 6/2, Bologna

I-40127, Italy^4

Fermilab, PO Box 500, Batavia

IL

60510-5011, United States^5

INFN, Via Marzolo 8, Padova

35131, Italy^6

关键词: Agile resource;    Further works;    High-level triggers;    Integral part;    Single use;    Triggering systems;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/513/3/032019/pdf
DOI  :  10.1088/1742-6596/513/3/032019

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

The CMS High Level Trigger is a compute farm of more than 10,000 cores. During data taking this resource is heavily used and is an integral part of the experiment's triggering system. However, outside of data taking periods this resource is largely unused. We describe why CMS wants to use the HLT as a cloud resource (outside of data taking periods) and how this has been achieved. In doing this we have turned a single-use cluster into an agile resource for CMS production computing. While we are able to use the HLT as a production cloud resource, there is still considerable further work that CMS needs to carry out before this resource can be used with the desired agility. This report, therefore, represents a snapshot of this activity at the time of CHEP 2013.