1. COST724 Server Inter Process Communication on different machines implemented in PHP...

2. Description Inter Process Communication (IPC) through TCP/IP client-server architecture Transferring of input and output files by using the File Transfer Protocol (FTP) Socket to socket communication between PHP scripts Current implementation allows the execution of models located on the server machine through a WWW interface.

3. Features A WWW interface handles the generation of input and control data Transfer of input and control data from the local server to the remote server running the models Local storage on remote server Execution of the model on the remote server Transfer of output data and completion code from the remote server back to the local server Postprocessing of output data on local server Presentation of model run result files to the user

4. Diagram Client PC Local HTTP Server Remote Model Server 2. Transfer file request 3. Ftp input file 1. Access the www interface 4. Run model request 5. Ftp result files Show results Running model Postprocessing

5. Models Currently implemented:  Geomagnetic cutoff calculations using Størmer's formula, based on routines used in SPENVIS (provided by D. Heynderickx)SPENVIS  Geomagnetic cutoff calculations using a Runge-Kutta procedure (provided by K. Kudela and M. Storini) Under development:  Magnetocosmics (provided by L. Desorgher)  Ionospheric model (provided by J. Lilenstein)

6. Interface screenshots

8. Model results: example

9. Postprocessing results: example