CERN Accelerating science

Documents & Reference


Document Description
WLCG Document repository WLCG documents, reporting etc.
Computing Model update (April 2014) Update of the Computing Models of the WLCG and the LHC Experiments
Technical Design Report (2005) Original design of WLCG from 2005
User Guide Comprehensive overview of the WLCG environment.
How to run the HEP-SPEC06 benchmark

Snapshot activity (example of grid from August 2017 data)





WLCG logos 

Tiers & Grid images

Tiers hierachy map (June 2014)




Grid Traffic (realtime snapshot)

  • Upload into Google Earth the network link for WLCG; some instructions how are here.
  • Untick all the logos to remove them from the screen. Also go to View and untick toolbar and sidebar
  • Rotate Earth to desired angle, slide time-slider to locate and display interesting traffic
  • File > Save > Save as Image
WLCG Current Sites Current WLCG sites - you can download, share or embed this map. It automatically updates if you have embedded it in your site.
LHC ring Available in various formats in CDS


Computing for the Large Hadron Collider, Ian Bird. "Annual Review of Nuclear and Particle Science", Vol. 61: 99-118, November 2011

Computing Service for LHC: From Clusters to Grids, Les Robertson. Chapter 3 from "From the Web to the Grid and Beyond, Computing Paradigms Driven By High Energy Physics", R. Brun, F. Carminati, G.G.Carminati, eds., Springer-Verlag Berlin Heidelberg, 2012.


LHC Data processing

Exploration on the Big Data Frontier (TedxCERN)

Press Clippings

Some of the significant press articles about WLCG



Page last updated on: 17 Sep 2019