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HOWTO14 How to use COMPSs
COMPSs is a programming framework, composed of a programming model and an execution runtime which supports it, whose main objective is to ease the development of applications for distributed environments. On the one hand, the COMPSs programming model aims to keep the programmers unaware of the execution environment and parallelization details. On the other hand, the COMPSs runtime is in charge of optimizing the performance of the application by exploiting its inherent concurrency. The runtime intercepts any call to a selected method creating a representative task and finding the data dependencies with all the previous ones that must be considered along the application run.
Through the monitoring of the workload of the application, the runtime determines the excess/lack of resources and turns to cloud providers enforcing a dynamic management of the resource pool. In order to make COMPSs interoperable with different providers, a common interface is used, which implements the specific cloud provider API. Currently, there exist connectors for Amazon EC2, Azure and for providers that implement the Open Cloud Computing Interface (OCCI) and the Open Virtualization Format (OVF) specifications for resource management.