






            Cornell Theory Center, Cornell National Supercomputer Facility


            _A_d_d_r_e_s_s:
               Cornell University
               Engineering and Theory Center Building
               Ithaca, NY, USA 14853-3801

            _E_m_a_i_l: consult@eagle.tc.cornell.edu

            _P_h_o_n_e: (607) 254-8686

            _D_e_s_c_r_i_p_t_i_o_n

            The Cornell Theory Center at Cornell University  is  one  of
            four  National  Advanced  Scientific  Computing Centers sup-
            ported  by  the  National  Science  Foundation.  The  Theory
            Center's  resources  have  been  used  by  more  than  5,000
            researchers in fields as diverse as  aerospace  engineering,
            economics,  and  epidemiology.  Its  staff  offers technical
            expertise in  software,  visualization,  vectorization,  and
            parallel  processing  to  its  users,  and investigates new,
            highly parallel processing resources for the scientific com-
            munity in order to increase the usability of these computers
            through systems development and through examination of tech-
            niques  to  improve  performance. A variety of education and
            training programs are also offered to high school, undergra-
            duate, and graduate students, and their professors.

            The Theory Center, through its  Cornell  National  Supercom-
            puter Facility (CNSF), provides a world-class supercomputing
            environment that includes traditional  vector-scalar  super-
            computing  resources, in addition to scalable, parallel sys-
            tems. Theory Center  resources  were  recently  upgraded  to
            include a single six-way IBM ES/9000-900 supercomputer (with
            2.66 Gflops peak  aggregate  performance,  9  Gbytes  shared
            memory).  An important feature for many users who now access
            1 Gbyte of virtual memory is  that  each  user  process  may
            access  up  to  2  Gbytes  of virtual memory on the ES/9000.
            Parallel resources  at  the  Theory  Center  include  a  32-
            processor  KSR1,  the  32-processor  Parallel  Visualization
            Server (PVS) and a Scalable Cluster  of  RISC  Systems.  The
            _________________________
            The information in this section is provided  in  accor-
            dance  with the copyright notice appearing at the front
            of this guide.




            August 3, 1992              NNSC        Section 1.2,  Page 1








            KSR1 is a scalable parallel system manufactured  by  Kendall
            Square  Research  and offers 1.28 Gflops peak aggregate per-
            formance, and a 1 Gbyte shared memory and 1000 Gbyte address
            space per processor.

            The Theory Center is a  national  center  of  expertise  for
            IBM's PVS and the visual programming interface Data Explorer
            (DX). The PVS is a  parallel  computer  that  implements  DX
            across  32  processors using a large global memory, and per-
            forming up to 2.5 Gflops.  This  processing  speed  combined
            with the portable, user-friendly DX software allows an enor-
            mous range of performance levels with no change in  function
            for  the  user.   The same DX is available, for example,  on
            the Center's Scalable Cluster of RISC Systems (SCRS),  which
            consists of multiple RS/6000 workstations connected via high
            speed networking.

            This RISC Cluster is  being  used  for  multiprocessing  and
            parallel  computing. The cluster presently consists of eight
            model 550s, each with at least 128Mb of memory and all  run-
            ning AFS (Andrew File System).  PVM is available to affect a
            message- passing parallelism.  For those with X-capable dev-
            ices,  the  Center  has a PVM workbench to facilitate use of
            the cluster.  Express will also be  available  in  the  near
            future.

            In addition to the production operating  environments,  full
            support for communications across the NSFNET is provided via
            TCP/IP.   Interprocess  communications,   including   remote
            logins,  FTP  file  transfer,  and X Window System, are sup-
            ported.  FORTRAN is the primary language, and  is  supported
            in  scalar,  vector,  and  parallel  modes, with interactive
            debug  and  execution   analysis.    Scientific   subroutine
            libraries  are available, including vectorized and parallel-
            ized versions.  Online HELP facilities, UNIX man pages,  and
            a  Cornell  set  of  TUTOR  examples assist users.  Graphics
            software supports both local hardware and remote facilities.
            Several  well-known  application  packages  and  a  list  of
            software are available upon request.

            _N_e_t_w_o_r_k _A_c_c_e_s_s

            The Theory Center's resources can be reached via the  Inter-
            net  (supporting  remote  login,  file  transfer, electronic
            mail, and graphics).  Users can access the CNSF  via  direct
            dialups:   607-255-4141  provides  300,  1200, and 2400 baud
            service;  607-254-5454 provides 9600 baud service.




            August 3, 1992              NNSC        Section 1.2,  Page 2








            _W_h_o _C_a_n _U_s_e _t_h_e _C_e_n_t_e_r

            All proposals for time on the Theory Center's resources  are
            subject  to peer review through the Theory Center's National
            Allocations Committee; researchers must submit  an  applica-
            tion  for  supercomputer time directly to the Theory Center.
            Corporations interested in using the Theory  Center  through
            the  Center's Corporate Research Institute may contact Linda
            Callahan at the address and phone number above.










































            August 3, 1992              NNSC        Section 1.2,  Page 3


