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Given by Dick Pritchard(OSC) at Chemical Engineering Alliance AT Meeting Univ of Kansas on March 4 99. Foils prepared March 26 99
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Summary of Material
| Survey of ASC Gateway Project given at NCSA Alliance Meeting |
| for Chemical Engineering Application Team |
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Relations to Alliance (NCSA)
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Outside Index
Summary of Material
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| The "Gateway" Architecture Concept and |
| Integrated Problem Solving Environments (PSEs): |
| DoD HPCM Program Effort |
| Dr. R. H. (Dick) Pritchard |
| Director, Federal Programs, OSC |
| 4 March 1999 |
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| Gateway Concept (as conceived by NPAC-Syracuse) |
| · Three-tiered architecture |
| · Web browser PSEs for clients |
| · Object Request Broker (ORB)-based Java middleware |
| · Middleware interfaces PSE to back-end mainframes and provides various "services" |
| Client |
| Tier |
| Middle Layer (Server Tier) |
| Backend Tier |
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| Comments on Gateway Concept |
| · Interfaces between tiers (software) very important |
| · Interface to back-end security will use Alliance PKI approach |
| . Will focus on "seamless access" (i.e., invoking given job on any of multiple backend systems), then infrastructure need for "metacomputing" later |
| · DoD HPCMP is funding initial implementation at ASC MSRC (WPAFB) |
| · Both OSC and NPAC have specific areas of contribution |
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| Initial PSE for Computational Chemistry and Materials |
| Code Layer: |
| Code Selection |
| Input Generation |
| Platform Selection |
| Job Submission |
| Results Layer: |
| Job Status |
| File Access |
| Results Viewer |
| Entry Layer: |
| Login Page |
| User Page |
| Problem Description Layer: |
| Concept / Code Documentation |
| Method Selection |
| Code Recommendation |
| http://www.osc.edu/~kenf/Gateway/ |
| · 3-tier architecture: robust, convenient mainframe/code access |
| · Common interface for both novice/advanced problem solving |
| · Expand scientific horizons by reducing computer science aspects |
| · Natural multidisciplinary extensions |
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| What is the DoD CCM Project? |
| Objective: To employ the tools of HPC in addressing fundamental chemical and materials issues that impact development of DoD weapons systems for the warfighter, including new materials, materials properties and performance, chemical and biological weapons defense, materials and equipment aging and deterioration, and cross-disciplinary problems for which chemical phenomena are a significant component. |
| http://www.arl.hpc.mil/PET/cta/ccm/ |
| http://www.asc.hpc.mil/PET/CCM/ |
| CCM PSE |
| Polymer Modeling |
| Reactive Flow Modeling |
| Materials and Surfaces |
| Full PSE development |
| Polymer composite heat/impact |
| response |
| Ballistic Performance |
| enhancement |
| Gun Tube Erosion Inhibition |
| Widespread deployment |
| Aircraft component design, heat shields |
| Crusader Program |
| (new 155mm shell) |
| Activity |
| Objective |
| Possible Impact |
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| CCM PSE Overview Map |
| · Shows how multiple "layers" are implemented |
| · Many map elements are activated to guide user to specific areas of interest |
| · Much more than just a browser job submission portal -- provides user guidance and step-by-step direction for novices, including input set-up for codes |
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| ORB-based Java Middleware (WebFlow) |
| · To be implemented by NPAC-Syracuse in cooperation with OSC implementation of CCM PSE |
| · Interface requirements currently being defined -- will use XML |
| -- Client -- Middleware (standard "buttons" on client invoking |
| middleware services) |
| -- Middleware -- Backend (instantiating generic service request on |
| chosen backend) |
| · Effort includes transition to secure environment (Kerberos/SecurID) and interface to ASC scheduler (PBS) |
| . Will provide generic "services" such as access to scheduler, job composition, visualization, job submission, etc. |
| · Fully functional demo planned for SC99 |
| · Replication of PSEs for other computational areas will follow based on structure developed for CCM |
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| · Gateway will build on backend provided by Globus and especially will take security from Globus (Alliance) |
· Alliance "Post Web" Computing Initiative led by Dan Reed and Dennis Gannon in PSE arena
|
| · There is an international effort called DATORR (desktop access to remote resources), and both Gateway and Alliance will work with this standards activity |
| http://www-fp.mcs.anl.gov/~gregor/datorr/ |
| · Working with DoD and Alliance on "application requirements" and "role of visualization" in PSE |
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| Summary |
| · Gateway concept is viable and quite attractive to users and government leads |
| - CCM PSE demo well received by key DoD people |
| · NPAC and OSC have made significant strides in laying out specifications for the PSE, middleware and interfaces |
| · Plan for full integration into ASC MSRC after proof of concept (~Jan 2000) |
| · OSC also plans to integrate Gateway architecture for state users in our own center |