The Cray T3E is a solid parallel multiprocessor computer with distributed memory (Distributed MEMORY MIMD), which was sketched in the 90's by the company Cray and 1995 replaced the predecessor model Cray T3D. The T3E consisted so-called processing of element (PEs) of 8 to 2176, each consisting of a DEC alpha 21164 (EV5), clocked with 300 MHz, microprocessor, between 64 MT and 2 GB RAM as well as a 6-Wege-Switch, which had a maximum range of 480MB/Sekunde in both directions. As is the case for the T3D the PEs was connected in such a way that they formed a three-dimensional torus body.

One of the largest differences to the T3D (and many other MPP systems) lay in it that the T3E needed no more host computer and even under the UNICOS/mk operating system ran (its individual server was implemented (as with MACH) on different PEs). The I/O subsystem, Cray's "“GigaRing"”, which made the network, disk and Tape I/O available, was integrated directly into the torus.

From the T3E several versions existed:

• The original version, later as T3E-600 designates.
• The T3E-900, whose processors with 450 MHz were clocked,
• the T3E-1200 with 600 MHz processor clock,
• the T3E-1200E, with which the speed of the memory and the connections of the PEs were improved,
• and the T3E-1350, whose processor clock was increased additionally to 675 MHz.

Beginning with the T3E-900 for the PEs no more of the 21164 (EV5) was used, but the faster 21164A (EV56).

All versions were offered air-cooled ("“air Cooled"”, AC) and liquidcooled ("“liquid Cooled"”, LC). Dependent on it could 16 to 128 PEs (air-cooled) or 64 to 2048 PEs (liquidcooled) to be used.

A T3E was the first supercomputer, which reached an achievement of over 1 TFLOPS during the execution of a scientific application; application was implemented 1998 on a T3E-1200 with a configuration of 1480 PEs (see more externally left).

Related links

• User side of the society for scientific data processing Goettingen
• Archived message the Berkeley labs over the reaching of the 1 TFLOPS mark

Articles in category "Cray T3E"

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