NDGF Tier1 is one of 11 regional computing centres of the Worldwide LHC Computing Grid – the huge international e-infrastructure built to provide computing and storage for the CERN. This Nordic solution is unique in being distributed across four countries: Denmark, Finland, Norway and Sweden. (Click here to list all WLCG resources)
ALICE is one of the experiments at the LHC, largely dedicated to studies of quark-gluon plasma in heavy ion collisions. It uses NDGF Tier1 together with six other Tier1 centres across the planet. All four NDGF countries host ALICE computing and storage resources.
ATLAS is the largest LHC experiment, dedicated to searches of new particles and phenomena in proton-proton collisions. NDGF Tier1 is one of 10 Tier1 centres used by ATLAS. Three NDGF countries, Denmark, Norway and Sweden, host ATLAS computing and storage
Computing services at NDGF Tier1 are offered via ARCmiddleware, which we help developing. This allows us to use distributed storage, since ARC takes care of staging input and output data. It also maximises efficiency of usage of computing nodes.
(Click here to see current computational load).
Storage of NDGF Tier1 is distributed across many computing centres. The dCache system , developed with contribution from NeIC, takes care of orchestrating data stored on disks and tapes all over Scandinavia. It also accepts data from CERN and other Tier1 centres.
A number of additional services are necessary for a Grid center operations. These include VOMS, FTS, BDII, SAM tests, and of course smooth network services. NDGF Tier1 uses these products as provided by their respective developers and EGI.