ETA Systems

ETA Systems

ETA Systems was a supercomputer company spun-off from Control Data Corporation (CDC) in the early 1980s in order to regain a footing in the supercomputer business. They successfully delivered an excellent machine, the ETA-10, but lost money continually while doing so. CDC management eventually gave up and folded the company.

Historical development

Seymour Cray left CDC in the early 1970s when they refused to continue funding of his CDC 8600 project. Instead they continued with the CDC STAR-100 while Cray went off to build the Cray-1. Cray's machine was much faster than the STAR, and soon CDC found itself pushed out of the supercomputing market.

William Norris was convinced the only way to regain a foothold would be to spin off a division that would be free from management prodding. In order to regain some of the small-team flexibility that seemed essential to progress in the field, ETA was created in 1983 with the mandate to build a 10GFLOPS machine by 1986.

Products

ETA had only one product, the ETA-10. It was essentially a modernized version of the CDC Cyber-205 computer, and deliberately kept compatiblility with it. Like the Cyber series, the ETA-10 did not use vector registers as in the Cray machines, but instead used pipelined memory operations to a high-bandwidth main memory. The basic layout was a shared-memory multiprocessor with up to 8 CPUs (and up to 16 I/O processors), each capable of 4 double-precision or 8 single-precision operations per clock cycle.

The main reason for the ETA-10's speed was the use of a liquid nitrogen cooling in some models to cool the logic components. Even though it was based on then-current CMOS technologies, the cooling allowed the CPUs to operate on a ~7ns cycle, so a fully-loaded ETA-10 was capable of about 4.5 GFLOPS. The design goal had been 10 GFLOPS, so the design was technically a failure. Two LN2-cooled models were designated ETA-10F and ETA-10G. Two slower, lower-cost air-cooled versions, the ETA-10Q and ETA-10P (code named "Piper") were also marketed.

The planned follow-on was supposed to be designated ETA-30, as in 30 GFLOPS.

oftware

Software for the ETA-10 line is largely regarded as a disaster. When CDC and ETA first designed the ETA architecture, they made the conscious decision not to port the CDC VSOS operating system from the earlier CDC 205. It was felt by both the vendor, and the existing customer base (who wrongly believed that their vendor knew best), that a new OS needed to be written to extract the best performance from the hardware. It was all "down hill" from here. They didn't realize the fact that typical new operating systems take 10 years for major debugging.

When ETA-10s initially shipped in 1986 there was no operating system for the machines. Programs had to be loaded one at a time from an attached Apollo Computer workstation, run, and then the supercomputer rebooted to run the next program.

At the time Unix was making major inroads into the supercomputing fields, but ETA decided to write their own EOS operating system, which wasn't ready when the first machines were delivered. An operating system based on UNIX System V became available in 1988, at which point it looked like the machine might finally succeed. Many sites that had refused to pay for their machines due to the low quality of EOS found ETA's UNIX completely usable and were willing to accept delivery.

It is a mistake to believe that ETA's demise was based solely on operating system choice or existence. The Fortran compiler (ftn200) had not changed from the CDC205. This compiler retained vendor-specific programming performance features (known as the Q8* subroutine calls) in an era when supercomputer users were realizing the necessity of source code portability between architectures. Additionally, the compiler optimizations were not keeping up with existing technology as shown by the Japanese supercomputer vendors as well as the newer minisupercomputer makers and competition at Cray Research.

In general, computer hardware manufacturers prior and up to that period tended to be weak on software. Libraries and available commercial and non-commercial (soon to be called open-source) applications help an installed base of machine. CDC was relatively weak in this area.

In April 1989 CDC decided to fold ETA back into CDC, by which point 7 liquid-cooled and 27 air-cooled machines had been sold. At this point ETA had the best price/performance ratio of any supercomputer on the market, and its initial software problems appeared to be finally sorted out. Nevertheless, shortly thereafter CDC exited the supercomputer market entirely, giving away remaining ETA machines free to high schools through the SuperQuest computer science competition.

Naming the Firm

Neil Lincoln, chief architect, asserts that ETA is not an acronym, and otherwise means nothing, not even the well known acronym of "estimated time of arrival." In point of fact, he says that he would not have named the firm that so as to dissociate it from, ETA, the Basque separatist group, or the "Eta", the Japanese social minority (especially as Japan was considered a market), see ETA (disambiguation). According to one of the CPU designers at ETA, Neil told a story that his son actually came up with the name - apparently a linotype machine has characters arranged in the order of frequency used in the English language (etaoin / shrdlu / cmfwyp / vbgkqj / xz) - and the first 3 letters were used.

Another theory asserts the name was chosen based on the frequency of English alphabet letters due in part to the then current popularity of Douglas Hofstadter's 1980 book Gödel, Escher, Bach which used ETAODIN, etc., to capitalize on popularity and current hip-ness.

A third, completely plausible theory, is that ETA was a successor name to the much earlier Engineering Research Associates ERA: Engineering Technology Associates. Norris and others have denied this.

ee also

*Thomas Jefferson High School for Science and Technology won one of the donated ETA-10 supercomputers
*EOS was the initial operating system developed by ETA Systems
*Unix was the later, more popular operating system

External links

* [http://www.museumwaalsdorp.nl/computer/en/eta10p.html Computer history TNO location The Hague/Waalsdorp: the ETA10-P]
* [http://yarchive.net/comp/eta_peglar.html The ETA Saga]


Wikimedia Foundation. 2010.

Поможем написать курсовую

Look at other dictionaries:

  • ETA (disambiguation) — ETA ( eu. Euskadi Ta Askatasuna ) is a Basque separatist group. Eta (Η, η), is the seventh letter of the Greek alphabetETA may also refer to:* ETA SA, a Swiss watchmaking company * ETA Systems, defunct manufacturer of ETA10 supercomputers * ETA a …   Wikipedia

  • Eta Boötis — Location of η Boötis Observation data Epoch J2000      Equinox J2000 …   Wikipedia

  • Eta Delphini — Datos de observación (Época J2000.0) Constelación Delphinus Ascensión recta (α) 20h 33min 57,04s …   Wikipedia Español

  • Eta Capricorni — A Constelación Capricornio Ascensión recta α 21h 04min 24,30s Declinación δ 19º 51’ 18,0’’ Distancia 15 …   Wikipedia Español

  • Eta Telescopii — Constelación Telescopium Ascensión recta α 19h 22min 51.21s Declinación δ 54º 25’ 26.2’’ Distancia …   Wikipedia Español

  • Eta Corvi — η Corvi An artists conception of many Kuiper Belt objects and comets flying through the Eta Corvi system and producing a Late Heavy Bombardment. Observation data Epoch J2000.0      Equinox J2000.0 (ICRS)… …   Wikipedia

  • ETA — Infobox militant organization name = Euskadi Ta Askatasuna, (ETA) caption = ETA symbol dates = 1959–present leader = Mikel Garikoitz Aspiazu Rubina Txeroki Fact|date=February 2008 motives = The creation of an independent socialist Basque Country… …   Wikipedia

  • Eta Carinae — Datenbanklinks zu Eta Carinae Stern η Carinae …   Deutsch Wikipedia

  • Eta Car — Datenbanklinks zu Eta Carinae Stern Eta Carinae (η Car) …   Deutsch Wikipedia

  • List of operating systems — Operating systems can be categorized by technology, ownership, licensing, working state, usage, and by many other characteristics. In practice, many of these groupings may overlap.Early, and historically important*CTSS (The Compatible Timeshare… …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”