Germany · decommissioned · hpc

JUROPA

Also known as Juelich Research on Petaflop Architectures

Operated by Forschungszentrum Julich at Julich Supercomputing Centre .

Phase 1 seed dataset, compiled by hand. These rows were built from public operator, laboratory and vendor sources. A mechanical second-reader pass has since fetched every cited source: 1092 of 1153 systems have a readable citation that names them, and 40 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: 274.80 TFlop/s
Rpeak: 308.28 TFlop/s
Rmax ÷ Rpeak: 89.1%
Cores: 26,304
Power: 1.55 MW
Per watt: 0.2 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	- NovaScale R422-E2 with Sun blade servers	Bull ATOEPA rolls up to Atos	-	Reported	top500.org fz-juelich.de
CPU	- Xeon X5570 4C 2.93GHz (Nehalem)	Intel INTCNASDAQ	-	Reported	top500.org fz-juelich.de
Interconnect	Mellanox InfiniBand QDR Interconnect Fat tree · 40 Gb/s per 4x port Infiniband QDR Sun M9 / Mellanox / ParTec	NVIDIA NVDANASDAQ	-	Reported	top500.org fz-juelich.de
Operating system	SUSE Linux Enterprise Server Operating systems Linux distribution · Open source, commercial support subscription SUSE Linux	SUSE	-	Reported	top500.org

The read

Juelich Supercomputing Centre's general-purpose cluster of Bull NovaScale R422-E2 and Sun blade servers, 13th on the November 2009 TOP500. TOP500 lists 26,304 Xeon X5570 4-core 2.93 GHz cores on a Mellanox InfiniBand QDR network with Sun switches and ParTec ParaStation software at 274.8 TFlop/s Rmax and 308.28 TFlop/s Rpeak, drawing 1,549 kW. Juelich's farewell notice independently confirms the Intel Nehalem processors, Mellanox QDR InfiniBand, Sun switch technology, ParTec software, nearly 300 teraflops in 2009 and the shutdown on 24 June 2015 after almost six years, with JURECA as successor. TOP500 is the only source for Rmax, Rpeak and cores, so the tier is reported.

Timeline

2009 First operational source
2009-11 List debut at #13 (November 2009) source
2015-06-24 Decommissioned source

Public list appearances

Pointers only: rank and edition, linking to the canonical entry. We do not reproduce list tables. See sourcing policy.

#13: TOP500, November 2009 →

Site & facility

Julich Supercomputing Centre

Location: Julich, Germany
Cooling: Direct liquid cooling
Commissioned: 2004

fz-juelich.de

Change history

2026-10-02 Added JUROPA, the Juelich Bull and Sun cluster, 13th on the November 2009 TOP500

Source check

We fetched this system's own citations and recorded whether each page actually mentions it. This is a corroboration signal, not a fact check, and it is published so you can see how well the sourcing holds up rather than take it on trust.

Cited source	Result	Found on the page
top500.org	names system and part	Mellanox InfiniBand QDR, SUSE Linux Enterprise Server
fz-juelich.de	names system and part	Mellanox InfiniBand QDR

Checked 2026-10-09 by pnpm verify. Re-run it and the table changes with the web.