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The PRISM Support Initiative (PSI):scope and structure

Version summer 2005

Eric Guilyardi

LSCE/CNRS & CGAM/Reading

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PRISM concept

Share the development, maintenance and support of an

Earth System Modelling software environment

• ease everyday life of climate scientists• provide latest technology, practice• ease procurements, optimization of codes

• hence reduce related personnel/computing costs for institutes

• no climate science issues, no hardware issues (ENES)• no management of CPU/model/data access services

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a) PRISM software infrastructure (“tool box”):

1. standard coupler and I/O software, OASIS3, OASIS42. standard compiling environment (SCE) at the scripting level3. standard running environment (SRE) at the scripting level4. Graphical User Interfaces (GUIs) to SCE and SRE5. GUI for an end-to-end monitoring of climate experiments6. standard diagnostic and visualisation tools

b) Demonstration:

1. 12+ model components adapted to PRISM standards (PSMILe interface, SCE, SRE, GUI), 15+ coupled combinations as demos

2. PRISM SCE and SRE are configured for 9 European sites 3. GUIs installed in two sites (MPI, ECMWF)

c) A well coordinated network of experts

PRISM FP5 project achievements

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Infrastructure = long term commitment

How to organise sustainability ?

1. EU not really helpful (requires already existing sustainability)

2. Earth system modelling institutes and partners: requires coordination

PRISM project has shown that solution 2 can work (as a distributed team of experts)

Community launch of “PRISM sustained team”, Paris 27/10/04

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PRISM community

1.      

Community

Associate Partners

Partners

Associate PartnersAny Institution, Centre or Vendor who contributes effort coordinated by the PRISM Support Initiative (PSI)

PartnersContribute significant effort coordinated by the PSI (+0.5 py/y)Constitute the PSI Steering Board

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PSI structure

PRISM Team

from Partners and Associate Partners

Invited Technical Advisors

PSI Technical Coordinator

High levelrequirements

PRISM User Group

PUG Chair

PSI Steering Board (ownership of process)

PSI-SB Chair

- SD Process -Standards Definition and

Technical Decision Making Process

Report

Request for changes to or new standards

Has final decision

Organise

Provide technical Requirements

Set directions

PSI Management Coordinator

Support

Coordination

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PSI Steering Board role

• Coordinate and provide effort to fulfil (in priority order): 1. Software maintenance and service support, 2. Support for adaptation of models to PRISM, 3. Development against current requirements of adapted models,4. Development against future requirements.

• Further sub-divided to meet the needs of (in priority order):• Partners• The Associates Partners• The Community

1. To help resolve disagreements (technical or structural)

Initial members: Met Office, Model & Data, CNRS, NEC-CCRLE, CERFACS, ECMWF

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PRISM Team tasks

• PT technical coordination (Lead: S. Valcke, CERFACS):• PT coordination, system integration• System specifications based on PUG requirements • Organise work of Standards definition process• Technical audit coordination

• PRISM software technical developments • Coupler (Lead: S. Valcke, CERFACS)• SCE/SRE (Lead: S. Legutke, M&D)• GUI (Lead: C. Larsson & N. Wedi, ECMWF)• Versioning control / CM (Lead: M. Carter, Met Office )• Diags and visualisation (Lead: J. Wegner, M&D)• Data management (Lead: M. Lautenschalger, M&D)

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• Support to PSI-SB activities• Coordinattion of non-technical activities such as:

• General PSI coordination• Coordination of bids for external funding• Community outreach & coordination, relations with other projects (ESMF, FLUME, etc)• PSI internal services (WEB, collaborative tools, …)

PRISM User Group (PUG)

PRISM Management Coordinator(E. Guilyardi, CNRS)

(Chair: R. Budich, MPI-M)

• Open to all• Organise capture of community requirements:

• changes to or new standards and interface definitions• additional features to PRISM software (e.g. data assimilation,…)

• Participation in system specifications• Community audit

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PSI next milestones

• Organise first SB meeting to endorse proposals• Establish 3 years detailed work plan • Organise technical and community audits