CERN Data Centre

Also known as CERN Tier-0; Meyrin and Prevessin data centres

Operated by CERN .

Researched with AI assistance, checked by scripts. These rows were researched by AI agents reading public operator, laboratory and vendor sources, appended by scripts and checked by automated validation; no subject-matter expert has reviewed them (how this site is made). A mechanical second-reader pass has since fetched every cited source: 1350 of 1540 systems have a readable citation that names them, and 64 are genuinely weakly sourced. Every claim carries its source and a confidence tier. Treat anything below verified as a lead, not a citation.

Measured performance

Rmax: -
Rpeak: -
Rmax ÷ Rpeak: -
Cores: 450,000
Power: -
Per watt: - GF/W

Figures are as last publicly reported for the configuration described below, not a live measurement. Where a system was upgraded in place, the post-upgrade configuration is shown and the earlier one appears in the timeline.

What this machine is made of

One row per supplier relationship. “Supplier at build” is the company that shipped the part at the time; where that company has since been acquired, the parent it rolls up to today is shown beside it. That distinction is what makes ticker-level aggregation possible across a thirty-year dataset.

Role	Part	Supplier at build	Quantity	Confidence	Source
Integrator	- Built and run by CERN IT: private OpenStack cloud and HTCondor batch service; no external system integrator named	CERN	-	Reported	home.cern

The read

Computing heart of CERN and Tier-0 of the Worldwide LHC Computing Grid. CERN's page states 450,000 processor cores and 10,000 servers running around the clock, with over 90 percent of compute provided through a private OpenStack cloud; the batch layer is an HTCondor service. Capacity is split between the older Meyrin data centre, which keeps most of the storage, and a second data centre at Prevessin in France inaugurated on 23 February 2024: over 6,000 square metres, six server rooms with 2 MW of cooling each (about 12 MW by simple sum), 78 racks per room, populated over roughly ten years, with target PUE 1.1 and WUE 0.379 L/kWh. Prevessin is meant for physics data-processing CPU servers plus business-continuity capacity. CERN's pages do not give a per-site core split, CPU model, vendor or electrical load, and no HPL result exists. The core count comes from the Data Centre page alone.

Timeline

No dated events recorded.

Change history

2026-10-18 Added CERN Data Centre (CERN)