The table at the end of the article, showing roughly Teraflops as a function of year. I'd be interested to see a corresponding table for minicomputers, microcomputers and other desktop machines such as GPU's.
Mainframes and Supercomputers, From the Beginning Till Today
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Re: Mainframes and Supercomputers, From the Beginning Till Today
#12It’s evident, scrolling through that, how drab computers have become. The 360 had a giant control panel with blinken lights, and cool looking tape drives. The Cray looks cool, despite the lack of control panel. Everything else is just a drab rack.
Much of that has with miniaturization. Those massive tapes had downright abysmal storage capacities by today's standards. And binkenlights vanished when ICs could switch so fast that the human eye would just see a steady light (much like we can't see a fluorescent lamp blinking).
I wish my new desktops looked as cool as the ones SGI made back in the day.
Re: Mainframes and Supercomputers, From the Beginning Till Today
#13> The first mainframe was created by the well-known IBM in 1964
Were the IBM 700/7000 series (1953-1964) not mainframes? I would say they were.
And what about other vendors pre-1964 machines, e.g. UNIVACs. Were they not mainframes too?
> you need to determine what the super-computer differs from the mainframe and which is faster
I'm not convinced that "mainframe" and "supercomputer" are necessarily mutually exclusive categories. What about the IBM 7030 Stretch? Doesn't it belong to both?
There have been supercomputers with an S/360-descended architecture. For example, the Fujitsu FACOM VP and VP2200 series, the Hitachi HITAC S-810. Such machines were both supercomputers and IBM-compatible mainframes, and could run variants of MVS.
Re: Mainframes and Supercomputers, From the Beginning Till Today
#14> During the first month of IBM, orders were received for more than a thousand copies of such machines, and in the 6 years of the family’s existence, more than 33,000 such machines were sold. What for? I can imagine some tasks for such a machine in the middle of XX century, but not for thousands of them.
As I recall, it was widely believed that there was an economy of scale for mainframe computers, so you were better off serving all of your users with a single timesharing machine if possible. If most of your programs ran in batch mode, then you might need 64k, but only for a couple seconds a day, so you shared those 64k with 1000 other people.
Re: Mainframes and Supercomputers, From the Beginning Till Today
#15It’s evident, scrolling through that, how drab computers have become. The 360 had a giant control panel with blinken lights, and cool looking tape drives. The Cray looks cool, despite the lack of control panel. Everything else is just a drab rack.
Much of that has with miniaturization. Those massive tapes had downright abysmal storage capacities by today's standards. And binkenlights vanished when ICs could switch so fast that the human eye would just see a steady light (much like we can't see a fluorescent lamp blinking).
Those lights were directly connected to the main bus which ran at several hundred khz to the low mhz. You never looked at them while the machine was running except as a way to confirm "something" was happening. You would not see individual pulses but rather they would appear dim or bright depending on activity.
Instead the machines had a single step mode where you could force the computer to execute one instruction at a time. Or you could pause the machine completely and manually poke bits into memory yourself.
The real death of the front panel was when machines got their own bootloaders and could load their operating system without the operator manually injecting instructions on how to read from external storage directly into memory. This actually happened much later than you might appreciate. This combined with software based debuggers which could be more powerful.
Re: Mainframes and Supercomputers, From the Beginning Till Today
#16This is kind of a scatterbrained article, it doesn't tie in mainframes in a meaningful way. The CDC 6600 and IBM 7030 Strech would have been a better starting point for supers. The S/360 mainframe was primarily a business line of computers, although the 360/91 was a capable super.
So to expand on mainframes in particular, which are less well documented/understood by my generation:
The IBM mainframe continued being primarily a business computer but they often had enhanced capability models like the 3090 with optional vector facilities that put them in competition with dedicated supercomputers.
Few people that came into computing in the 1990s and thereafter realize that a lot of what we might assume to be "modern" capabilities existed since the 1970s, via these machines. The machines gave companies inter-office memos (email), document preparation (word) and document/image storage (like modern dropbox, gdrive etc), OLTP (like later RDBMS oracle etc), OLAP (like modern hadoop, terradata etc), custom applications and hardware for all kinds of line of business activities like automated logistics via bar code systems, point of sales cash registers and bar code scanners, ATMs, complex billing generators printers that could customize/cut/collate bills and notices, bill processors with check printers/OCR scanners, phone switchboard integration for call routing and auto-attendant etc.
VTAM and SNA allowed the machines to communicate, and intercommunicate with machines of other companies across the globe. Time sharing services were offered for smaller companies in a way not dissimilar to modern "cloud computing". International networks existed to interchange data between different computer types like https://en.wikipedia.org/wiki/Tymnet.
The machines were also critical to the design and engineering of large construction, manufacturing, PLM, and simulation. Aircraft, ship building, power plant design, space exploration, automotive, circuit board and VLSI chip design/layout/EDA.. all that was primarily done on these machines up until the early '90s when UNIX workstations took over. CADAM, CATIA etc lots of good history covered on http://mbinfo.mbdesign.net/CAD-History.htm.
It's actually kind of astounding how much these did and how quickly it was washed out of common knowledge. If you had a white collar job in the '70s-early '90s you probably directly and indirectly spent a lot of time on these machines. 3270 terminals and later PCs with 3270 emulation.
Today, the mainframe is still integral to the running of Western civilization, although they are almost exclusively back office transaction processing and batch reporting systems.
Re: Mainframes and Supercomputers, From the Beginning Till Today
#17Very cool. I wish I was able to locate a Thinking Machines CM-5 before they were all destroyed. Even the front indicator panel would have been nice. I’ve created my own smaller version with an Arduino and some LED panels but its not the same.
I'm thinking about building a panel that'd would gather core activity of a couple machines and map that onto one or more 8x32 LED matrices. The core activity would be gathered from a client running on the machines themselves and sent to the machine running the panel.
On my tests running ffmpeg, however, the results would be disappointing: all LEDs light up at the same time...
Re: Mainframes and Supercomputers, From the Beginning Till Today
#18> The first mainframe was created by the well-known IBM in 1964 Were the IBM 700/7000 series (1953-1964) not mainframes? I would say they were. And what about other vendors pre-1964 machines, e.g. UNIVACs. Were they not mainframes too? > you need to determine what the super-computer differs from the mainframe and which is faster I'm not convinced that "mainframe" and "supercomputer" are necessarily mutually exclusive…
A good way to distinguish a mainframe from a supercomputer would be served with... a car analogy.
A race car is often uncomfortable and hard to drive. You need to be physically fit to drive it. Supercomputers are the race cars of computers. You need to do crazy tricks to extract their maximum theoretical performance. Mainframes, however, are more suitable to run common tasks, are easier to drive and generally more reliable. A mainframe like a 360/195 would be somewhat like a BMW M-series. Its performance is impressive, but you don't need to practice your whole life not to kill yourself in one.
Re: Mainframes and Supercomputers, From the Beginning Till Today
#19Disappointing it does not mention Convex Computer, which:
-produced the world's first commercially available gallium arsenide supercomputer, the Convex C3
-owned the minisupercomputer market from ~1986 through its end in 1995
-built the first commercially successful flat address space, cache coherent massively parallel processor the SPP1000 series in '94
Re: Mainframes and Supercomputers, From the Beginning Till Today
#20It’s evident, scrolling through that, how drab computers have become. The 360 had a giant control panel with blinken lights, and cool looking tape drives. The Cray looks cool, despite the lack of control panel. Everything else is just a drab rack.
I just missed the 360 era when I became an operator, but the 370 console was similar in sci-fi-ish feel. There was a hexadecimal rotary dial via which you'd set the boot device address, and an actual mechanical switch to boot it up.
In contrast, the 3033 operator console was just sort of a glorified terminal.
I thought the Quiesce feature was so cool -- you could freeze all programs and OS activity in place, then disconnect and work on any devices or peripherals at will, then resume.
In a mere 2-year span, I got to run 370s, 3033s, 308x (including the 4-processor 3084), and 309x not long after I left operations for programming.