PMES, the execution environment

The Programming Model Enactment Service (PMES) is a web service that allows the execution of applications programmed with the COMPSs programming model. A client is used to contact an OGF BES compliant endpoint in order to submit the execution of the application. This request is expressed through a JSDL document containing the application name, the input parameters and data references. When a request is received, a virtual machine is requested to the Cloud Provider in order to deploy the application by downloading its package from a storage location. Once the runtime machine is deployed the COMPSs application is remotely started. On its turn, the COMPSs runtime will schedule the tasks on a set of machines created on demand. This phase includes the staging of input files from remote locations as specified in the execution request. The COMPSs-PMES service can be also configured to boot a predefined number of VMs on the provider where the service is deployed; this solution allows serving requests that involve the execution of smaller operations in a reasonable time avoiding the overhead of VM creation; if the number of requests exceeds the available resources, the service is still able to dynamically deploy new instances in order to cope with the loadburst.

For questions or information about PMES please contact us at info@eubrazilcc.eu.