Supercomputers/Systems/NOAA Luna
USA · operational · hpc
NOAA Luna
Also known as Luna
Operated by NOAA .
Researched with AI assistance, checked by scripts. These rows were researched by AI agents reading public operator, laboratory and vendor sources, appended by scripts and checked by automated validation; no subject-matter expert has reviewed them (how this site is made). A mechanical second-reader pass has since fetched every cited source: 1350 of 1540 systems have a readable citation that names them, and 64 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
- 1.64 PFlop/s
- Rpeak
- 2.04 PFlop/s
- Rmax ÷ Rpeak
- 80.3%
- Cores
- 48,960
- Power
- 956.25 kW
- Per watt
- 1.7 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 | - Cray XC40 | Cray HPENYSE
rolls up to Hewlett Packard Enterprise | - | Reported | top500.orgnextplatform.com |
| CPU | Intel Xeon E5-2690 v3 CPUs x86-64 · 12C · 2.6 GHz · 22 nm · 135 W Intel Xeon E5-2690v3 12C 2.6GHz | Intel | - | Reported | top500.org |
| Interconnect | Cray Aries Interconnect Dragonfly · About 10 GB/s per direction · Around 1 microsecond Aries interconnect | Cray HPENYSE
rolls up to Hewlett Packard Enterprise | - | Reported | top500.org |
| Operating system | Cray Linux Environment Operating systems Linux, Cray-customised · Proprietary layer over open-source Linux Cray Linux Environment | Cray HPENYSE
rolls up to Hewlett Packard Enterprise | - | Reported | top500.org |
The read
One of two Cray XC40 systems NOAA added to its operational weather computing in late 2015; the other is Surge (noaa-surge). Next Platform says the pair was tested alongside the iDataPlex clusters from fall 2015, was accepted in December 2015, and cost $44.5 million in total ($19.5 million under the IBM contract and $25 million from the Disaster Relief Appropriations Act of 2013). The article puts the machines at Reston, Virginia and Orlando, Florida but the fetched pages do not say which is which, so no site is recorded. TOP500 gives Luna and Surge identical figures: 48,960 cores of Xeon E5-2690v3, 1.635 PFlop/s Rmax, 2.037 PFlop/s Rpeak, 956.25 kW, Cray Linux Environment. Next Platform quotes 2.06 PFlop/s peak per XC40 and 2,048 Haswell nodes, and its chart labels the network FDR InfiniBand while its text and TOP500 say Cray Aries; Aries is recorded. Listed from November 2015 (rank 43) to June 2021 (rank 474). 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.
Change history
- 2026-10-17 NOAA Luna added from its source pages
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 |
|---|---|---|
| nextplatform.com | names system and part | Intel Xeon E5-2690 v3, Cray Aries, Cray Linux Environment |
| top500.org | names system and part | Intel Xeon E5-2690 v3, Cray Aries, Cray Linux Environment |
Checked 2026-10-18 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.