Verteilte Entwicklung am Beispiel des Flugzeugentwurfs (EFENDA). Teilvorhaben: Kommunikationsbibliotheken Abschlussbericht

The purpose of the subproject was the further development of the parallel aerodynamic simulation program FLOWer (DLR) for cooperative, distributed heterogeneous use under the multimedia software environment COVISE (RUS). The parallelisation of FLOWer is based on the GMD communications library CLIC. The message passing model PARMACS used in the library was converted to the current message passing standard MPI. The library uses its own buffering of the data to be communicated. Therefore for communication within the heterogeneous computer cluster the whole buffering and communication had to be replaced for the MPI environment. Example computations were performed on clusters of SGI, IBM, and HP/Convex workstations. FLOWer using MPI CLIC was ported to HP/Convex, Cray, NEC SX3, and SGI Origin. So that the parallel FLOWer simulation on a remote computer could be started and controlled from a workstation in B-Win under COVISE, a coupling based on IP-Sockets was developed. The coupling interface supports starting, coupling, and decoupling the multimedia interface COVISE on FLOWer. This enables the execution of FLOWer on a machine with batch operation and interactive control and visualisation. Prototype sessions with COVISE took place with the partners, supported by B-Win desktop conference software, running FLOWer on the GMD parallel computers. The desktop conference software was also used for general development work. (orig.)Available from TIB Hannover: DtF QN1(66,28) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEBundesministerium fuer Bildung, Wissenschaft, Forschung und Technologie, Bonn (Germany)DEGerman