Integrated Research in GRID Computing- P12:The deployment process for adaptive Grid applications does not finish when the application is started. Several activities have to be performed while the application is active, and actually the deployment system must rely on at least one permanent process or daemon. | Integration of ISS into the VIOLA Meta-scheduling Environment 211 18 The SI computes the T model parameters and writes the relevant data into the DW. The user only has to submit the workflow the subsequent steps including the selection of well suited resource s are transparent to him. Only if an application is executed for the first time the user has to give some basic information since no application-specific data is present in the DW. There is a number of uncertainties in the computation of the cost model. The parameters used in the cost function are those that were measured in a previous execution of the same application. However this previous execution could have used a different input pattern. Additionally the information queried from the different resources by the MSS is based on data that has been provided by the application or the user before the actual execution and may therefore be rather imprecise. In future by using ISS such estimations could be improved. During the epilogue phase data is also collected for statistical purpose. This data can provide information about reasons for a resource s utilisation or a user s satisfaction. If this is bad for a certain HPC resource for instance because of overfilled waiting queues other machines of this type should be purchased. If a resource is rarely used it either has a special architecture or the cost charged using it is too high. In the latter case one option would be to adapt the price. 6. Application Example Submission of ORB5 Let us follow the data flow of the real life plasma physics application 0RB5 that runs on parallel machines with over 1000 processors. ORB5 is a particle in cell code. The 3D domain is discretised in N1XN2XN3 mesh cells in which movep charged particles. These particles deposit their charges in the local cells. Maxwell s equation for the electric field is then solved with the charge density distribution as source term. The electric field accelerates the particles during a short time and
