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Report of the Software Engineering Working Group
Fifth Annual CCSM Workshop
Co-Chairs: Cecelia
DeLuca, Ricky Rood, and Jim Rosinski
The Village at Breckenridge, Thursday, June 29, 2000
SUMMARY
Much of the
CCSM Software Engineering
Working Group (SEWG) meeting focused on two major initiatives involving the
CCSM and their relationship to each other. The first, an ongoing DOE/NCAR effort with an 18-month timeline, is
centered on restructuring the CSM's
atmospheric component and flux
coupler. The second initiative, which
is still in its formative stages, involves the development of a community
framework for climate and weather models and related codes. Framework development and an implementation
of the CCSM using the framework are part of the proposed reponse to a (still-to-be-released) NASA HPCC
Cooperative Agreement Notice (CAN). Once started, the timeline for the NASA CAN project will be 3 years.
Several participants
were concerned that the DOE/NCAR group was beginning to create a framework
independently, and that if the CCSM was significantly revamped, there would be
less incentive to adopt the community framework once it was completed. Although there have been efforts to integrate
the two projects, more formal coordination was called for.
Following this
exchange, Brian Kauffman led a discussion on a proposed Software Developer's
Guide. The Developer's Guide would
contain coding conventions and procedural conventions for the design, testing,
and configuration management of CCSM code. A template and assortment of references are available at:
http://www.cgd.ucar.edu/csm/working_groups/Software/develop_guide.html
The two major outcomes of the meeting were:
1) Plans to write a
CCSM Software Engineering Plan. The
Software Engineering Plan, analagous to the overall CCSM Plan distributed at
the workshop, will outline a strategy for CCSM software development over the
next five years. This will include a
decsription of the major initiatives involving the CCSM, their relationships,
and a timeline. Cecelia DeLuca (SCD)
and Jay Larson (ANL) will
coordinate. The first draft will be
distributed to reviewers August 18, 2000.
2) The creation of a
CCSM Software Developer's Guide. Brian
Kauffman will be a point-person for collecting information. A meeting to discuss the Developer's Guide
will be scheduled in early fall 2000 jointly with the Common Modeling
Infrastructure Working Group (CMIWG). The CMIWG has promoted standards
for atmosphere-related scientific codes.
PRESENTATIONS
Cecelia DeLuca
(NCAR/SCD) introduced the SEWG and provided an overview of
activity areas. These included 1) CCSM
code development and the coordination of multiple efforts, 2) staff development, 3) software process
improvement, 4)
coordination and creation of new collaborations, 5) investigation of tools for
collaboration and software production, and 6) technology tracking.
Ian Foster (ANL) gave
an overview of the DOE/NCAR project, "Development of a Modular, Performance-Portable
Climate System Model." The goals
of this project are to restructure key portions of CCSM code so that it can run
efficiently on scalable parallel computers; simplify experimentation via a
more modular code structure; and enable multi-lab, multi agency
development. The project includes the
design of a high-performance atmospheric model based on the CCM, a
high-performance coupler, Parallel Ocean Program model improvements, and
parallel I/O. A systematic, staged
development approach has been adopted that involves the generation and review
of requirements and design documents, and common code repositories.
John Drake (ORNL)
described plans to redesign the CCM as part of the DOE/NCAR project. Some of the goals of the effort include high
performance on a variety of computational platforms, "pluggable"
dynamics, and adoption of column phyics interchange rules.
Jay Larson (ANL)
outlined the DOE/NCAR work on the CCSM flux coupler. Starting with an evaluation of existing PCM and CSM couplers, the
coupler team plans to implement short-term fixes, as well as undertake the
rigorous development of a "next generation coupler."
Steve Hammond (NCAR/SCD) talked briefly about the NASA HPCC Cooperative Agreement Notice that calls for an "Earth System Modeling Framework." The framework is intended to reduce redundant development and improve code interoperability. A collaboration has been established that includes participants from NASA, GFDL, LANL, NCAR, NCEP, MIT, and ANL. Several of the collaborating institutions have code that illustrates proof-of-concept.
Participants:
|
FirstName |
LastName |
email |
|
Thomas |
Bettge |
bettge@ucar.edu |
|
Maurice |
Blackmon |
blackmon@ucar.edu |
|
Francis |
Bretherton |
fbretherton@ssec.wisc.edu |
|
Lawrence |
Buja |
southern@ucar.edu |
|
Anthony |
Craig |
tcraig@ucar.edu |
|
Gokhan |
Danabasoglu |
gokhan@ncar.ucar.edu |
|
Cecelia |
DeLuca |
cdeluca@ucar.edu |
|
Robert |
Dickinson |
robted@eas.gatech.edu |
|
Brian |
Eaton |
eaton@ucar.edu |
|
Ian |
Foster |
itf@mcs.anl.gov |
|
Aime |
Fournier |
fournier@ucar.edu |
|
Steve |
Hammond |
hammond@ucar.edu |
|
Matthew |
Hecht |
hecht@ncar.ucar.edu |
|
Hiromaru |
Hirakuchi |
hiromaru@criepi.denken.or.jp |
|
Forrest |
Hoffman |
forrest@esd.ornl.gov |
|
Robert |
Jacob |
jacob@mcs.anl.gov |
|
Philip |
Jones |
pwjones@lanl.gov |
|
Akira |
Kasahara |
kasahara@ncar.ucar.edu |
|
Brian |
Kauffman |
kauff@ucar.gov |
|
David |
Klepacki |
klepacki@watson.ibm.com |
|
Erik |
Kluzek |
erik@ucar.edu |
|
Jay |
Larson |
larson@mcs.anl.gov |
|
Keith |
Lindsay |
klindsay@cgd.ucar.edu |
|
Robert |
Malone |
rcm@lanl.gov |
|
Mathew |
Maltrud |
maltrud@lanl.gov |
|
Jose |
Milovich |
milovich1@llnl.gov |
|
David |
Myers |
dmyers@terra.msrc.sunysb.edu |
|
Jerry |
Olson |
olson@ucar.edu |
|
Jagadish |
Shukla |
shukla@cola.iges.org |
|
John |
Truesdale |
jet@ucar.edu |
|
David |
Williamson |
wmson@ucar.edu |
|
Stephen |
Yeager |
yeager@cgd.ucar.edu |
|
Stephen |
Zebiak |
steve@iri.ldeo.columbia.edu |