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NCAR - National Center For Atmospheric Research
_A_d_d_r_e_s_s:
Visitor/User Information
NCAR/Scientific Computing Division
P.O. Box 3000
Boulder, Colorado 80307-3000
_E_m_a_i_l: scdinfo@ncar.ucar.edu
_P_h_o_n_e: (303) 497-1225
_D_e_s_c_r_i_p_t_i_o_n
The Scientific Computing Division (SCD) of the National
Center for Atmospheric Research (NCAR) provides supercomput-
ing resources and services that support research in the
atmospheric, oceanographic, and related sciences. We
emphasize facilities for the development and execution of
large models and for the archival and manipulation of large
datasets.
Computer Hardware
o+ CRAY Y-MP8/864 with 8 processors; CRAY Y-MP2D with 2
processors
o+ 64 Mwords of main memory for the Y-MP8, 16 Mwords for
the Y-MP2
o+ 48 Mword maximum memory per job for batch; 16 Mwords
for interactive
o+ 6.0-ns clock for both Crays; a measured peak rate of
over 1 Gflops has been achieved with a multitasked
ocean model
o+ Vector processing hardware for both Crays
_________________________
The information in this section is provided in accor-
dance with the copyright notice appearing at the front
of this guide.
October 16, 1992 NNSC Section 1.4, Page 1
o+ 256 Mword SSD for Y-MP8 (1000 Mbyte/sec channel), 128
Mword SSD for Y-MP2
o+ 78 Gbytes of local storage for the Y-MP8, 20 Gbytes of
local storage for the Y-MP2
o+ Unix front end
o+ NCAR Mass Storage System (MSS) is a hierarchical file
storage system with no limit per user. The MSS has a
120 Gbyte disk farm and 115,000 IBM 3480/3490 car-
tridges. It features a StorageTek 4400 Automated Car-
tridge System capable of holding 6,000 cartridges, or
a terabyte of information. Currently, MSS stores 29
terabytes of data. Extremely high data transfer to
the Crays; accessible from front end
o+ Connection Machine 2 (8,000 processors and floating-
point hardware)
o+ Gateway for NCAR's Internet Remote Job Entry System
(IRJE). Allows users to create and submit Cray jobs
from their local hosts connected to the Internet. Out-
put is automatically shipped back to the remote host
Application Libraries
Application libraries and documentation are available via
the Distributed Software Libraries (dsl) utility. To access
dsl, telnet to dsl.ucar.edu and log in as dsl. When
prompted for the password, type software.
ALFPACK AMOSLIB* ECMFFT EDA
EISPACK EISPKD FISHPAK FITPACK*
FUNPACK IMSL* CRAYFISH* LINPACK
FFTPACK MINPACK MUDPACK* NAG*
ODEPACK SPHERE SLATEC SSDLIN
STARPAC* NCARM NCARO
*Documentation only available for these libraries over the
dsl utility.
Graphics
NCAR Graphics, Version 3.1
October 16, 1992 NNSC Section 1.4, Page 2
Training
o+ UNICOS Orientation Class: One-day class to introduce
Unix/UNICOS programming tools and the NCAR computing
environment.
o+ Unix Basics Class: Two-day introduction to the basics
of Unix
o+ Remote site visits are granted to sites with a signi-
ficant number of users
o+ User conference held every two years to update users
on new developments and new directions in computing at
NCAR
o+ Site liaison workshops held biennially: intensive,
in-depth presentations on specific aspects of the NCAR
computing facility
o+ NCAR Graphics on and off-site workshops and Fortran
optimization workshops
Collaborative Research
o+ Real-time computing during field programs
o+ Classroom grants of computer time
o+ Computer Hardware, Advanced Mathematics, and Model
o+ Model Evaluation Consortium for Climate Assessment
(MECCA). MECCA is evaluating the reliability of
current global climate simulation models.
Documentation
o+ Documentation available via anonymous FTP to
ftp.ucar.edu. Listing is in /docs/README file.
o+ User Documentation Catalog containing references both
to SCD-supported and vendor documentation. Available
online via anonymous FTP to ftp.ucar.edu with the
filename /docs/catalog/userdoc.catalog
o+ Online documentation available for most of the
October 16, 1992 NNSC Section 1.4, Page 3
utilities in the supported libraries via dsl
o+ Scientific Computing Division (SCD) hardcopy documen-
tation available free except for the Graphics manual
o+ NCAR UNICOS Primer: contains necessary basic informa-
tion to begin computing at NCAR. Uses step- by-step
examples to create, submit, and receive output from
the Crays
o+ Daily Bulletin: Online source of up-to-date informa-
tion on the computing systems
o+ Newsletter: SCD Computing News (free)
o+ Annual planning report: Supercomputing: The View From
NCAR
o+ NCAR Annual Report
o+ NCAR Annual Scientific Report
Consulting
o+ Phone, 8-5 MST weekdays; walk-in consulting available
for visitors and local users. Extended consulting
available by appointment
o+ Email consulting available from Internet, BITNET, and
Omnet
o+ Specialized consulting for software libraries, net-
working and data communications, optimization, multi-
tasking, Cray I/O optimization, segmentation (overlay-
ing) of large applications, math algorithms, NCAR
Graphics, IBM PC/AT and Macintosh terminal emulators,
and Unix and UNICOS operating systems
o+ Visitor facilities include access 24 hrs/day, 7
days/week, SUN Workstations, IBM PCs, and Macintoshes
for terminal or standalone use, Canon microfilm/fiche
reader/printers, community telephone for business use,
documentation library (including vendor documentation)
Graphics Support
October 16, 1992 NNSC Section 1.4, Page 4
o+ Text and Graphics System for both on-site and off-site
users, providing 16-mm film, 35-mm color slides, 4x5"
color film, microfiche, b&w hardcopy, and videotape
(VHS, SVHS, Umatic-SP).
o+ Xerox 4050 laser printers for paper graphical output
o+ Color hardcopy output is planned soon
o+ CGM metafile support
o+ Remote graphics support includes an NCAR Graphics
translator (ctrans) on the front end
o+ Output mailed to users at remote sites
Strengths and Limitations
Strengths
o+ High-performance vector processing
o+ Extensive user support services
o+ SSD for large I/O applications
o+ Extensive data archives for atmospheric and oceano-
graphic research
o+ High-volume, fast access mass storage system
o+ Extremely high volume graphics output capabilities
o+ Video support and 16-mm movie making
o+ Remote job entry system
Limitations
o+ Few applications outside atmospheric sciences
o+ Limited memory
Administrative
October 16, 1992 NNSC Section 1.4, Page 5
o+ Allocations are open to university researchers with
NSF grants in atmospheric, oceanographic, and related
sciences; grant requests are reviewed by a peer review
board composed of NCAR staff and university research-
ers
o+ Allocations are also available to government agencies
on a cost-recovery basis
_N_e_t_w_o_r_k _A_c_c_e_s_s
NCAR has access to several national networks using the
TCP/IP protocol, including NSFNET (backbone node) and NASA's
Science Network.
_W_h_o _C_a_n _U_s_e _T_h_e _C_e_n_t_e_r
SCD's computing resources are available to scientists and
researchers with NSF projects in the atmospheric, oceano-
graphic, and related sciences. Accounts must be approved
through SCD. Once approved, resources are allocated. Time
on the Y-MP8/864 is available to government agencies on a
cost-recovery basis. Users with NSF grants should contact
John Adams, NCAR/SCD, P.O. Box 3000, Boulder CO 80303, for
an application form.
October 16, 1992 NNSC Section 1.4, Page 6