Convex Computer

Source: Wikipedia, the free encyclopedia.
Convex Computer Corporation
IndustrySupercomputers
Founded1982; 42 years ago (1982) in Richardson, Texas
Founder
Defunct1995 (1995)
FateAcquired by Hewlett-Packard

Convex Computer Corporation was a company that developed, manufactured and marketed vector minisupercomputers and supercomputers for small-to-medium-sized businesses. Their later Exemplar series of parallel computing machines were based on the Hewlett-Packard (HP) PA-RISC microprocessors, and in 1995, HP bought the company. Exemplar machines were offered for sale by HP for some time, and Exemplar technology was used in HP's V-Class machines.

History

Convex was formed in 1982 by Bob Paluck and

Cray Research vector processor machines, with a somewhat lower performance, but with a much better price–performance ratio
. In order to lower costs, the Convex designs were not as technologically aggressive as Cray's, and were based on more mainstream chip technology, attempting to make up for the loss in performance in other ways.

Convex C-1 (1985)

Their first machine was the C1, released in 1985. The C1 was very similar to the

Ardent Computer
and Stellar (and merged Stardent).

Convex 240 supercomputer (1988))

The C2 was a crossbar-interconnected

multiprocessor version of the C1, with up to four CPUs, released in 1988. It used newer 20,000-gate CMOS and 10,000-gate emitter-coupled logic
(ECL) gate arrays for a boost in clock speed from 10 MHz to 25 MHz, and rated at 50 MFLOPS peak for double precision per CPU (100 MFLOPS peak for single precision). It was Convex's most successful product.

The C2 was followed by the C3 in 1991, being essentially similar to the C2 but with a faster clock and support for up to eight CPUs implemented with low-density GaAs FPGAs. Various configurations of the C3 were offered, with 50 to 240 MFLOPS per CPU. However, the C3 and the Convex business model were overtaken by changes in the computer industry. The arrival of RISC microprocessors meant that it was no longer possible to develop cost-effective high-performance computing as a standalone small low-volume company. While the C3 was delivered late, which resulted in lost sales, it was still not going to be able to compete with commodity high-performance computing in the long run.

Another speed boost used in the C3 and C4, which moved the hardware implementation to GaAs-based chips, following an evolution identical to that of the Cray machines, but the effort was too little, too late. Some considered the whole C4 program to be nothing more than chasing a business in decline.[according to whom?] By this time, even though Convex was the first vendor to ship a GaAs based product, they were losing money.

In 1994, Convex introduced an entirely new design, known as the Exemplar. Unlike the C-series vector computer, the Exemplar was a parallel-computing machine that used HP

SCI. First dubbed MPP, these machines were later called SPP [2] and Exemplar and sold under the SPP-1600 moniker. The expectation was that a software programming model for parallel computing could draw in customers. But the type of customers Convex attracted believed in Fortran and brute force rather than sophisticated technology. The operating system also had terrible performance problems which could not easily be fixed. Eventually, Convex established a working partnership with HP's hardware and software divisions. Initially it was intended that the Exemplar would be binary-compatible with HP's HP-UX
operating system but eventually it was decided to port HP-UX to the platform and sell the platform as standalone servers.

HP V-Class computer.

In 1995, Hewlett-Packard bought Convex. HP sold Convex Exemplar machines under the S-Class (MP) and X-Class (CC-NUMA) titles, and later incorporated some of Exemplar's technology into the V-Class machine, which was released running the HP-UX 11.0 release instead of the SPP-UX version which was sold with the S- and X-Class products.

References

  1. Patterson, David A. (Fall 1996). "Lecture 6: Vector Processing"
    (PDF). p. 8. Retrieved 2011-04-29.
  2. doi:10.1109/ICCD.1997.628877
    .

External links
Retrieved from "https://en.wikipedia.org/w/index.php?title=Convex_Computer&oldid=1184381463"