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Given by Geoffrey C. Fox at MAPINT97 Workshop on 16-18 June 97. Foils prepared June 27 97
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Summary of Material
| This has all the special foils for General Multidisciplinary Application talk at MAPINT 97 |
| Also those TANGO Presentation at MAPINT 97 foils that refer explicitly to use of TABGO in Multidisciplinary Applications |
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Multidisciplinary Applications MAPINT 97 Dayton 16 June 97
Abstract of Multidisciplinary Application Talk
3 Important Areas! What are we doing and What are we not doing!
Interoperable Interfaces
Multidisciplinary Applications
Metacomputing
Metacomputing Includes
Computer Science Issues in 3 Categories
Two Examples of Multidisciplinary Applications
The CISPAR Multidisciplinary Project
Computing Model in CISPAR
Coupling in CISPAR
COCOLIB Features
Three Possible Implementations
TANGO and its Application to Multidisciplinary Applications MAPINT 97 Dayton 18 June 97
Abstract of TANGO Presentation for Multidisciplinary Applications
TANGO2 Guiding Principles
TANGO Collaboration Model
TANGO Applications with their participants
TANGO Structure of Multidisciplinary Applications
Minimal Web based Multidisciplinary Application
Comparison of Communication/Linkage Models
Outside Index
Summary of Material
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| Geoffrey Fox |
| Syracuse University |
| NPAC |
| 111 College Place Syracuse NY 13244 4100 |
| 3154432163 |
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| We distinguish multidisciplinary problems, metacomputing and Interoperable interfaces |
| We need to consider difficulties of metaproblems, metacomputers and even harder meta-institutions |
| we illustrate with two examples: one from Europe couples two applications (CFD and structures) |
| One ASOP, from an ambitious NASA funded industry study considers Integrated Product and Process Development of a future aircraft |
| We discuss in consequence of Web distributed computing framework |
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| Interoperable Interfaces: allow a given problem to be easily run on any one of many different hosts |
Multidisciplinary Problems: A single job involves multiple different modules (say CFD and structures) which can on one or more machines
|
Metacomputing: Linkage of multiple, typically heterogeneous, computers to solve a given problem -- this is often a metaproblem
|
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| One example is VPL -- Virtual Programming Laboratory -- interface to HPF and MPI used by Syracuse and Cornell in courses/training |
| If you agree that it can be web based then naturally Implemented as Java Framework for Computing Services |
| Any Job |
| Computer A |
| Computer B |
| Computer C |
| Universal Interface |
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| Metaproblem Individual Computer or Metacomputer |
| Software Bus |
| Computer |
| Sequential or parallel or |
| Hardware Bus/Network of Metacomputer |
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| Mapping of general Problem or metaproblem onto general local or wide area network of computers |
| or |
| Any Job |
| Computer A |
| Computer B |
| Computer C |
| Computer D |
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| Includes cases like: with a --> A and b --> B which is classic distributed computing |
| As well as classic parallel computing (e.g. HPF) with a heterogeneous target |
| And arbitrary mixtures thereof |
| HPF Job |
| 12 Node SP-2 |
| 8 node PC Cluster |
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| Multidisciplinary Applications (in their simplest implementation) are distributed computing which is integration at server level in my Java Framework for distributed computing |
| General Metacomputing is the much harder combination of heterogeneous decomposition and integration |
| Interoperable interfaces involve setting of standards for a client server integration (Java computing services framework) |
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CISPAR: Ongoing ESPRIT (European Union) project involving academia and industry from multiple countries linking two MPI codes together (chosen from example 3D fluid and 2D solid industrial codes)
|
ASOP MADIC was Syracuse led but largely industry driven and developed a full multidisciplinary multi-organization (inter) nationally distributed Integrated Product and Process Development (IPPD) framework
|
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| 3 commercial codes (STAR-CD, PAM-CRASH, PERMAS) in CFD and structures |
| End Users from Aerospace, Ship (Insurance), Automobile and Heart Valve manufacturing arenas |
| High Performance computing expertise from industry (PALLAS), lab(GMD Bonn) and University (Imperial College UK) |
| Duration Jan 96 to Dec 98 |
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| Each of two codes has steps |
| Input --> Mesh Generation --> Partitioning --> MPI based simulation --> Post Processing |
| CFD |
| COCOLIB communication library supplies Data and Control |
| Structures |
| MPI Processes of individual programs |
| Partition Individual Grids |
| COCOLIB Interpolates between grids of 2 programs |
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Need high performance linkage between two codes as couple "microscopically" at
|
| In last case could perhaps use "high level" server linkage of codes |
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| Needs heterogeneous MPI implementations |
Designed to run with either
|
| Must interpolate between different types (element shapes) of structured and unstructured meshes |
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| COCOLIB Choice: |
| Optimal High Performance Choice |
| Data and Control |
| Data Only |
| CFD Server |
| Structures Server |
| Control |
| Only |
| Simplest Server level Implementation |
| Structures Server |
| CFD Server |
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| Lukasz Beca, Gang Cheng, Geoffrey Fox (Presenter), Tomasz Jurga, Konrad Olszewski, Marek Podgorny, Piotr Sokolowski, and Krzysztof Walczak |
| Syracuse University |
| NPAC |
| 111 College Place Syracuse NY 13244 4100 |
| 3154432163 |
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| We first review web based collaboration systems and the choices made in the core TANGO system including some refinements of the TANGO2 release |
| We survey applications of TANGO including command and control, education and video on demand |
| We relate TANGO capabilities to those identified for multidisciplinary applications and see that it fulfills some but certainly not all of them |
| We compare TANGO and WebFlow application interfaces |
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| "Buy a place at the table" with a core system that is competitive with other commercial and academic systems |
Then focus on specific TANGO features to support selected applications
|
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| TANGO supports client side electronic societies of people, instruments and their applications. |
TANGO links these to a network of Java Servers which manage TANGO sessions and interfaces them to the world wide Server Infrastructure that underlies our model of Web applications
|
| Electronic societies or groups are managed by core database in TANGO |
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| Crisis Management and Command and Control or more generally distributed (tactical) real-time decision support -- decision makers and gatherers of information |
| Forums and Chattering on the Web -- the world! |
| Education -- teachers and students (and administrators) |
| (Tele)medicine -- Doctors (primary and specialist referrals), Nurses, Patients and administrators |
| Business Enterprise (strategic) Support as in Lotus Notes -- Employees of Business including especially managers |
| Multidisciplinary Applications including Collaborative design -- teams of up to 10,000 engineers |
| Computational Steering -- one or more computational scientist and visualization device |
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| TANGO links people and shared applications such as chat board, audio video conferencing, visualizations, shared white board, common AUTOCAD design and related tools |
| CFD |
| TANGO Server |
| Database |
| Object Broker |
| MPP |
| Structures |
| MPP |
| Engineer |
| + core |
| services |
| Visualization e.g.CAVE |
| Shared AutoCAD |
| Engineer |
| + core |
| services |
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| This combines TANGO for collaboration with WebFlow to link server side applications |
If necessary WebFlow would support high performance inter-module communication as in structures-CFD Linkage example but it would always implement control and this allows TANGO integration with server side computation
|
| WebFlow communication model is a dynamic dataflow |
| Of course other server side compute models are possible and in general need (web-linked) data bases, file systems, object brokers etc., |
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| WebFlow supports dataflow model where user must supply routines to process input of data that drives module and output of data for other modules |
TANGO supports shared state and user supplies routines that read or write either
|
| Can be done for applications like AUTOCAD as vendor supplies necessary API |
| CFD |
| Structures |