Suchergebnisse

Current advances in telecommunication and computing will have significant impact on the proliferation of high performance computing and communication (HPCC) applications. With these emerging technologies, it is feasible to run parallel and distributed applications across a high speed wide area network which was not possible a few years ago; the high latency and low bandwidth were the main bottlenecks for the wide area network-based computing. This has lead to the deployment of several high speed networks across the country (eg. NYNET). In this report, we describe some of the HPCC applications and our experiences and lessons learned from running them over the NYNET testbed. NYNET is one of the first wide area networks to use commercially available ATM switches and first to have an aggressive research plan to develop a wide range of large scale HPCC applications. NYNET testbed covers all the New York State and part of Massachusetts State and provides an interconnection between leading educational institutions, government laboratories and industrial labs. The main objectives of this project were to develop and demonstrate HPCC applications and evaluate current HPCC enabling technologies. We show the benefits that can be achieved from applying HPCC technologies to implement applications encountered in military (eg. Multi-target tracker), industry (eg. Financial modeling), scientific applications (eg. Electromagnetic scattering) and health care. Futhermore, we benchmark and evaluate several parallel and distributed platforms and software tools for developing such HPCC applications on NYNET.

The process of integrating DoD Modeling and Simulation paradigms around the new HLA/RTI standards proceeds in parallel with the onset of new Object Web standards for distributed objects and componentware, emergent at the crossroads of CORBA, DCOM, Java, and XML based distributed object technologies. We describe here our WebHLA approach which integrates both trends by offering Object Web based implementation of the HLA framework. WebHLA follows a three-tier architecture including: a) Web / Commodity based interactive simulation authoring and runtime front-ends given by Java applets or DirectX multiplayers; b) software bus in the middleware, given by Object Web RTI i.e. our implementation of DMSO RTI 1.3 as a Java CORBA service managed by JWORB (Java Object Web Request Broker); c) domain specific backend simulation modules, including advanced high performance DoD simulation kernels such as ModSAF or SPEEDES. We describe here the overall design of WebHLA, we report on components prototyped so far and we summarize the status of the ongoing development of WebHLA applications.

HLA standards for interoperability between various DoD Modeling and Simulation paradigms are being enforced in parallel with the rapid onset of new Object Web / Commodity standards for distributed objects and componentware, emergent at the crossroads of CORBA, COM, Java, and XML technologies. WebHLA explores synergies between and integrates both trends by offering Object Web based implementation of the HLA framework. Our goal is to deliver a uniform platform that facilitates conversion of legacy codes to and development of new codes in compliance with HLA, HPC and Object Web standards. We outline here the overall design of WebHLA, we summarize the system components prototyped so far and we illustrate our approach for one HPC FMS application -- Parallel CMS (Comprehensive Mine Simulator) - in the area of large scale minefield simulation and countermine engineering.