| 16 | | == QCG !ProActive == |
| 17 | | The existence of many Java based legacy applications implied a need to find an appropriate framework which could provide a similar functionality for parallel Java applications as MPI offers to C/C++ or FORTRAN parallel code. Instead of exploiting existing Java bridges to MPI implementations we decided to use the !ProActive Parallel suite. The library uses the standard Java RMI framework as a portable communication layer. With a reduced set of simple primitives, !ProActive (version 3.9 as used in !QosCosGrid) provides a comprehensive toolkit that simplifies the programming of applications distributed on local area networks, clusters, Internet grids and peer-to-peer intranets for Java-based applications. To satisfy the requirements of complex system simulation applications and users, we developed extensions to the !ProActive library (called QCG-!ProActive) with the following goals: |
| 18 | | 1. To preserve standard !ProActive library properties (i.e., allow legacy !ProActive applications to be seamlessly ported to !QosCosGrid). |
| 19 | | 1. To provide end users with a consistent QCG Broker Job Profile schema as a single document used to describe application parameters required for execution as well as resource requirements (in particular network topology and estimated execution time). |
| 20 | | 1. To prevent end users from the necessity to have direct (i.e., over SSH) access to remote clusters and machines. |
