Supercomputers/Systems/Lucia
Belgium · operational · hpc
Lucia
Operated by Cenaero at Cenaero (Charleroi) .
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
- 2.72 PFlop/s
- Rpeak
- 3.09 PFlop/s
- Rmax ÷ Rpeak
- 88.0%
- Cores
- 23,200
- 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 | - HPE Apollo n2600/d6500 chassis (ProLiant XL675d Gen10 Plus), supplied through reseller Axians | Hewlett Packard Enterprise | - | Verified | top500.orgcenaero.be |
| Accelerator | NVIDIA A100 SXM4 40GB Accelerators CUDA (Ampere GA100) · 6,912C · 1.41 GHz · 7 nm · 400 W 50 GPU-partition nodes of four NVIDIA A100 SXM4 40GB each | NVIDIA | 200 reported | Verified | top500.orgdoc.lucia.cenaero.be |
| CPU | AMD EPYC 7513 (Milan) CPUs x86-64 · 32C · 2.6 GHz · 7 nm · 200 W AMD EPYC 7513 32C 2.6GHz across 300 CPU-partition nodes | AMD | - | Verified | top500.orgdoc.lucia.cenaero.be |
| Interconnect | NVIDIA InfiniBand HDR Interconnect Fat tree or dragonfly+ · 200 Gb/s per port · About 0.6 microseconds InfiniBand HDR-100 on CPU nodes, HDR-200 on GPU/AI nodes | NVIDIA | - | Verified | top500.orgdoc.lucia.cenaero.be |
| Operating system | Red Hat Enterprise Linux Operating systems Linux distribution · Open source, commercial support subscription RHEL 8.6 | Red Hat | - | Reported | top500.org |
The read
Wallonia's Tier-1 system at Cenaero, named for chemist Lucia De Brouckere and funded by the Walloon Region, built on HPE Apollo hardware supplied through reseller Axians. A 300-node CPU partition and a 50-node NVIDIA A100 GPU partition share one InfiniBand HDR fabric; TOP500's site record gives the precise locality as Gosselies, a district of the Charleroi agglomeration A6K's own announcement names. 245th on the November 2022 TOP500, its best-ever rank. TOP500 is the only source for Rmax, Rpeak and core count, so the tier is reported.
Timeline
Public list appearances
Pointers only: rank and edition, linking to the canonical entry. We do not reproduce list tables. See sourcing policy.
Site & facility
Change history
- 2026-09-24 Added: first supercomputer from Belgium in the dataset, Wallonia's Tier-1 system at Cenaero
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 |
|---|---|---|
| a6k.be | names system only | - |
| top500.org | names system, part and count | AMD EPYC 7513 (Milan), NVIDIA A100 SXM4 40GB, NVIDIA InfiniBand HDR · counts: 200 |
Checked 2026-10-09 by pnpm verify. Re-run it and the table changes with the web.
Further reading
Operating a supercomputer
Acceptance testing, why "installed" and "in production" are six months apart, and the machine lifecycle.
Inside a node
Latency-optimised versus throughput-optimised processors, NUMA, and the end of the host-to-device copy.
The interconnect
Topologies, why latency and tail behaviour matter more than bandwidth, and how the fabric market consolidated.