CERN Accelerating science


All data is extracted from SAM (Service Availability Monitoring)/Nagios.

See the SAM/Nagios Support pages which contain useful explanatory documentation, and the procedure for re-computation of data.


All Tier-1 and Tier-2 report data is compiled in the first week of every month.

All reports can be found in the WLCG Document Repository.



Page last updated on: 4 Oct 2018