The Cray XT6 is an updated version of the Cray XT5 supercomputer , launched on 16 November 2009. The dual- or quad-core AMD Opteron 2000-series processors of the XT5 are replaced in the XT6 with eight- or 12-core Opteron 6100 processors, giving up to 2,304 cores per cabinet. The XT6 includes the same SeaStar2+ interconnect router as the XT5, which is used to provide a 3-dimensional torus network topology between nodes. Each XT6 node has two processor sockets, one SeaStar2+ router and either 32 or 64 GB of DDR3 SDRAM memory. Four nodes form one X6 compute blade .
6-526: The XT6 family run the Cray Linux Environment version 3. This incorporates SUSE Linux Enterprise Server and Cray 's Compute Node Linux . The XT6m variant, announced at the same time as the XT6, is a mid-ranged supercomputer with most of the features of the XT6, but with a processor interconnect optimized for system sizes between 700 and 13000 cores and scalable up to 6 cabinets. The first customer for
12-408: A higher-level language ( Pascal ) with more modern optimizations and vectorizations. As a migration path for existing COS customers wishing to transition to UNICOS, a Guest Operating System (GOS) capability was introduced into COS. The only guest OS that was ever supported was UNICOS. A COS batch job would be submitted to start up UNICOS, which would then run as a subsystem under COS, using a subset of
18-568: Is the successor of the Cray Operating System (COS). It provides network clustering and source code compatibility layers for some other Unixes. UNICOS was originally introduced in 1985 with the Cray-2 system and later ported to other Cray models. The original UNICOS was based on UNIX System V Release 2, and had many Berkeley Software Distribution (BSD) features (e.g., computer networking and file system enhancements) added to it. CX-OS
24-628: The XT6 was the Engineering and Physical Sciences Research Council (EPSRC) of the United Kingdom , which upgraded the existing XT5h system, named HECToR , at the University of Edinburgh in 2010. This supercomputer-related article is a stub . You can help Misplaced Pages by expanding it . Cray Linux Environment UNICOS is a range of Unix and later Linux operating system (OS) variants developed by Cray for its supercomputers . UNICOS
30-574: The systems CPUs, memory, and peripheral devices. The UNICOS that ran under GOS was exactly the same as when it ran stand-alone: the difference was that the kernel would make certain low-level hardware requests through the COS GOS hook, rather than directly to the hardware. One of the sites that ran very early versions of UNICOS was Bell Labs , where Unix pioneers including Dennis Ritchie ported parts of their Eighth Edition Unix (including STREAMS input/output (I/O)) to UNICOS. They also experimented with
36-508: Was the original name given to what is now UNICOS. This was a prototype system which ran on a Cray X-MP in 1984 before the Cray-2 port. It was used to demonstrate the feasibility of using Unix on a supercomputer system, before Cray-2 hardware was available. The operating system revamp was part of a larger movement inside Cray Research to modernize their corporate software: including rewriting their most important Fortran compiler (cft to cft77) in
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