IMAGES — Post 49 “The Attack of the Killer Micros”

Image research for the MPP-vs-vector transition post (killer micros, MPI, spectral-transform parallelisation).

All images below were licence-verified on their Wikimedia Commons file pages. Six were downloaded to /home/michal/repos/michalbrennek.github.io/assets/images/. Two desired diagrams (domain-decomposition / halo-exchange, and a TOP500 architecture-share chart) were NOT found freely licensed on Commons — see the “Not found / to create” section.

HEADER IMAGE (downloaded)

Post49_Intel_Paragon_ORNL_header.jpg — landscape, public domain, an actual 1994 MPP machine.

The Intel Paragon XP-S-150 at Oak Ridge National Laboratory (1994). A real distributed-memory massively-parallel machine of the killer-micros era (i860 microprocessors in a 2-D mesh), photographed as a wide machine-hall row — public domain (US Government / DOE work), so no attribution obligation and safe to crop for a teaser.

DOWNLOADED IMAGES

Filename	Subject	Dimensions	Licence	Attribution string	Source page / direct URL
`Post49_Intel_Paragon_ORNL_header.jpg`	Intel Paragon XP-S-150, ORNL, 1994 (HEADER)	3000×2565	Public Domain (US Gov / DOE work)	Credit courtesy: DOE — Oak Ridge Office of Environmental Management (no legal attribution required)	https://commons.wikimedia.org/wiki/File:ORNL_Intel_Paragon_XP-S-150ORNL_1994(23601012678).jpg — https://upload.wikimedia.org/wikipedia/commons/b/b8/ORNL_Intel_Paragon_XP-S-150ORNL_1994%2823601012678%29.jpg
`Post49_CM5_Frostburg.jpg`	Thinking Machines CM-5 “FROSTBURG” (iconic black tower, red LEDs; at the National Cryptologic Museum)	1944×2592 (portrait)	CC BY-SA 2.0	Photo: brewbooks (near Seattle, USA), CC BY-SA 2.0	https://commons.wikimedia.org/wiki/File:FROSTBURG_Connection_Machine_CM-5(3320092635).jpg — https://upload.wikimedia.org/wikipedia/commons/b/b7/FROSTBURG_Connection_Machine_CM-5%283320092635%29.jpg
`Post49_Cray_T3E.jpg`	Cray T3E (MPP, 1995–96 — Met Office UM ran on this)	1704×2272 (portrait)	CC BY 2.0	Photo: Marcin Wichary (San Francisco), CC BY 2.0	https://commons.wikimedia.org/wiki/File:Cray_T3E_(2232420028).jpg — https://upload.wikimedia.org/wikipedia/commons/1/12/Cray_T3E_%282232420028%29.jpg
`Post49_Cray_T3E_Warsaw.jpg`	Cray T3E at the Museum of Technology, Warsaw (Polish tie-in)	900×1200 (portrait)	CC BY-SA 3.0 / GFDL	Photo: Hiuppo, CC BY-SA 3.0	https://commons.wikimedia.org/wiki/File:POL_Cray_T3E_Warsaw.jpg — https://upload.wikimedia.org/wikipedia/commons/6/69/POL_Cray_T3E_Warsaw.jpg
`Post49_Seymour_Cray.jpg`	Seymour Cray peeking behind a Cray-1 (the vector-industry figure; d. 5 Oct 1996)	5184×3456	CC BY 2.0	Photo: Michael Hicks, CC BY 2.0	https://commons.wikimedia.org/wiki/File:Seymour_Cray.jpg — https://upload.wikimedia.org/wikipedia/commons/2/29/Seymour_Cray.jpg
`Post49_Cray_YMP_vector.jpg`	Cray Y-MP (1988) — shared-memory VECTOR machine, for contrast with MPP	2272×1704 (landscape)	CC BY-SA 2.0	Photo: Carlo Nardone (Roma, Italy), CC BY-SA 2.0	https://commons.wikimedia.org/wiki/File:Cray_Y-MP_(1988)-_Computer_History_Museum(2007-11-1022.59.11_by_Carlo_Nardone).jpg — https://upload.wikimedia.org/wikipedia/commons/e/e5/Cray_Y-MP%281988%29-_Computer_History_Museum%282007-11-10_22.59.11_by_Carlo_Nardone%29.jpg

Notes:

Two Cray T3E photos were downloaded deliberately: the higher-resolution Wichary shot as the primary T3E image, and the Warsaw museum shot as an optional Polish-reader tie-in. Use either or both.
The Seymour Cray shot doubles as a vector-era HUMAN portrait AND shows a Cray-1, reinforcing the “vector past” visual. The Cray Y-MP gives a cleaner landscape shared-memory-vector contrast if a machine (not a person) is wanted.

CANDIDATE — LICENCE UNCONFIRMED / UNUSABLE (do NOT download)

Subject	Source	Status
ECMWF Cray computer-hall photo (Reading)	https://www.flickr.com/photos/ecmwf/48126133922	All Rights Reserved on Flickr — not reusable. ECMWF’s Flickr stream is not CC. Skip.

NOT FOUND FREELY LICENSED — writer should create these

Domain-decomposition / halo-exchange diagram — no CC/PD Commons file found (Media Search for “domain decomposition halo”, “grid partitioning parallel processors” returned nothing usable). The relevant figures live in arXiv / ResearchGate papers under non-free terms. RECOMMENDATION: the writer should draw a simple original SVG (a grid partitioned into rectangular subdomains with one-cell halo rings and arrows for the message exchange) — original work, freely licensable, and pedagogically cleaner than any found image. The site’s main.scss already frames body images with a white background + 16px padding, so a transparent SVG diagram will render correctly.
TOP500 architecture-share-over-time chart (MPP vs vector vs cluster vs SMP) — NOT present in Category:Graphs of TOP500 on Commons (that category has country / OS / processor-family / performance-development graphs, but no architecture-share graph). No freely licensed version located. RECOMMENDATION: either omit, or have the writer generate one from TOP500’s public statistics data (the numbers are freely available at top500.org/statistics) as an original chart.

CROSS-LINK SLUGS VERIFIED (from _posts)

Post 42 “The First in Bracknell” — /weather/hpc/history/2026/05/15/The-first-in-Bracknell.html ✓
Post 39 “Thirty-eight Years on the Sphere” — /weather/hpc/history/2026/05/14/Thirty-eight-years-on-the-sphere.html ✓
Post 47 “Eleven Years from the Adjoint” — /weather/hpc/history/2026/05/30/Eleven-years-from-the-adjoint.html ✓
Post 48 “The Hemisphere That Caught Up” — /weather/hpc/history/2026/07/20/The-hemisphere-that-caught-up.html ✓