Supercomputers/Systems/Arunika
India · operational · hpc
Arunika
Also known as NCMRWF Arunika
Operated by NCMRWF at NCMRWF (Noida) .
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
- 5.94 PFlop/s
- Rpeak
- 7.40 PFlop/s
- Rmax ÷ Rpeak
- 80.3%
- Cores
- 203,040
- Power
- 1.24 MW
- Per watt
- 4.8 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 XH2000 | Eviden | - | Reported | top500.orgprnewswire.com |
| CPU | - AMD EPYC 7643 48C 2.3GHz | AMD | - | Reported | top500.org |
| Interconnect | NVIDIA InfiniBand HDR Interconnect Fat tree or dragonfly+ · 200 Gb/s per port · About 0.6 microseconds Infiniband HDR | NVIDIA | - | Reported | top500.org |
| Operating system | Red Hat Enterprise Linux Operating systems Linux distribution · Open source, commercial support subscription Red Hat Enterprise Linux | Red Hat | - | Reported | top500.org |
The read
Eviden BullSequana supercomputer of India's National Centre for Medium Range Weather Forecasting in Noida, inaugurated on 27 September 2024 alongside the IITM system Arka. TOP500 lists a BullSequana XH2000 with AMD EPYC 7643 48C 2.3GHz processors over InfiniBand HDR running Red Hat Enterprise Linux, with Rmax 5.94 PFlop/s, Rpeak 7.40 PFlop/s, 203,040 cores and 1,235.8 kW; it first appeared on the November 2024 list at rank 189 and was 274th in June 2026. Eviden's release gives 8.24 petaflops, 24 PB of storage and warm-water direct liquid cooling built with AMD, NVIDIA and DDN, without naming CPU models; the 8.24 figure is a whole-system vendor number (including accelerators) and the TOP500 run is the CPU partition, 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
- 2026-10-02 Added Arunika
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 | NVIDIA InfiniBand HDR |
| prnewswire.com | names system only | - |
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.