Supercomputers/Systems/Kathleen
United Kingdom · operational · hpc
Kathleen
Also known as UCL Kathleen
Operated by UCL .
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
- -
- Rmax ÷ Rpeak
- -
- Cores
- 7,680
- 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 |
|---|---|---|---|---|---|
| CPU | - Intel Xeon Gold 6248 2.5GHz 20-core, 192 diskless nodes, two per node | Intel | - | Reported | rc.ucl.ac.uk |
| Interconnect | Omni-Path Architecture Interconnect Fat tree · 100 Gb/s per port · About 1 microsecond Intel Omni-Path network | Cornelis Networks | - | Reported | rc.ucl.ac.uk |
The read
Kathleen is UCL's cluster for multi-node parallel batch jobs, named for the crystallographer Kathleen Lonsdale. UCL's documentation says it was installed in December 2019 and went into service at the end of January 2020. It has 192 diskless compute nodes, each with two 20-core Intel Xeon Gold 6248 processors, 192 GB of DDR4 and an Intel Omni-Path network (7,680 cores by our multiplication of the stated per-node figures), plus two login nodes. It has since moved to RHEL9 and the Slurm scheduler. Operator documentation only, so the tier is reported.
Timeline
- 2020-01 First operational source
Change history
- 2026-10-09 Added Kathleen at UCL
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 |
|---|---|---|
| rc.ucl.ac.uk | names system only | - |
Checked 2026-10-09 by pnpm verify. Re-run it and the table changes with the web.