Supercomputers/Systems/Arka
India · operational · hpc
Arka
Also known as IITM Arka
Operated by IITM at IITM (Pashan, Pune) .
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
- 8.28 PFlop/s
- Rpeak
- 10.61 PFlop/s
- Rmax ÷ Rpeak
- 78.0%
- Cores
- 290,016
- Power
- 2.02 MW
- Per watt
- 4.1 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 (TOP500 manufacturer Bull; Eviden BullSequana XH) | Eviden | - | Verified | 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 |
| Storage | - DDN storage within a 33 PB system total (Eviden release names DDN as partner) | DDN | - | Reported | prnewswire.com |
| Cooling | - Eviden patented direct liquid cooling with warm water | Eviden | - | Reported | prnewswire.com |
| 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 the Indian Institute of Tropical Meteorology in Pune, inaugurated on 27 September 2024 alongside NCMRWF's Arunika. Eviden's release gives 11.77 petaflops and 33 PB of storage with warm-water direct liquid cooling, built with AMD, NVIDIA and DDN. TOP500 lists the CPU partition as a BullSequana XH2000 with AMD EPYC 7643 48C 2.3GHz over InfiniBand HDR on Red Hat Enterprise Linux: 290,016 cores, Rmax 8.28 PFlop/s, Rpeak 10.61 PFlop/s, 2,016.9 kW. It first appeared at rank 188 in November 2024 and was 219th in June 2026. The 11.77 PF vendor figure is whole-system including GPU nodes while the TOP500 run is CPU only, 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 Arka, IITM Pune's Eviden BullSequana, 188th on the November 2024 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 | 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.