Czechia · operational · hpc

Barbora

Also known as IT4Innovations Barbora

Operated by IT4Innovations at IT4Innovations, Ostrava .

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: -
Rpeak: 849.00 TFlop/s
Rmax ÷ Rpeak: -
Cores: 7,232
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	- BullSequana X platform (Bull, now Atos)	Atos ATOEPA	-	Reported	it4i.cz docs.it4i.cz
Accelerator	NVIDIA Tesla V100 Accelerators CUDA (Volta GV100) · 5,120C · 1.53 GHz · 12 nm · 300 W 8 GPU nodes x 4 NVIDIA Tesla V100 SXM2 16 GB with NVLink (quantity derived as 8 x 4)	NVIDIA NVDANASDAQ	32 reported	Reported	docs.it4i.cz it4i.cz
CPU	- 192 standard nodes with two 18-core Intel Xeon Cascade Lake 6240 at 2.6 GHz (quantity is nodes)	Intel INTCNASDAQ	192 reported	Reported	docs.it4i.cz it4i.cz
Interconnect	NVIDIA InfiniBand HDR Interconnect Fat tree or dragonfly+ · 200 Gb/s per port · About 0.6 microseconds InfiniBand HDR100 non-blocking fat tree (HDR 200 Gb/s on the fat node and per the IT4I overview)	NVIDIA NVDANASDAQ	-	Reported	docs.it4i.cz it4i.cz

The read

A BullSequana X cluster (Bull, now Atos) at the IT4Innovations national supercomputing centre in Ostrava, put into operation in autumn 2019 with a stated theoretical peak of 849 TFlop/s. IT4I lists 201 nodes: 192 standard nodes with two 18-core Cascade Lake Xeon 6240 (6,912 cores), 8 GPU nodes with two 12-core Skylake Gold 6126 and four V100 SXM2 GPUs each (32 GPUs), and one fat node with eight 16-core Skylake Platinum 8153 and 6 TB of RAM. The nodes are connected by InfiniBand HDR100 in a non-blocking fat tree and the standard nodes are direct liquid cooled; scratch is 310 TB at 28 GB/s with a burst buffer. The core count is the sum of the per-type figures in the IT4I documentation. Both sources are IT4I pages, so the tier is reported. No TOP500 entry is recorded.

Timeline

2019 First operational source

Site & facility

IT4Innovations, Ostrava

Location: Ostrava, Czechia
Cooling: Direct liquid cooling
Commissioned: 2013

it4i.cz

Change history

2026-10-04 Added Barbora, IT4Innovations

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
docs.it4i.cz	names system, part and count	NVIDIA Tesla V100 · counts: 32
it4i.cz	names system, part and count	NVIDIA Tesla V100, NVIDIA InfiniBand HDR · counts: 32

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