The mixed use of gLite-based academic grids and Eucalyptus-based clouds is enabled for large parameter sweep simulations by interconnecting P-GRADE with both gLite grids and Eucalyptus clouds. As a result any existing VO of EGEE can be extended with cloud resources in a seamless way.
Conclusions and Future Work
Future work will include the designation of a smart scheduler than can optimize the number of jobs to be sent to the clouds and to the grid according to the available grid and cloud resources. Furthermore, the model will be extended for commercial models including the consideration of payment for cloud resources.
The 3G Bridge is an extensible generic grid-to-grid bridge developed in the EDGeS project. Its modular plugin
architecture allows extending it to connect arbitrary grid middleware. The Eucalyptus/ Amazon EC2 plugin for the 3G-Bridge allocates resources from the cloud to a pool accessible via a standard job manager (e.g. Condor) for job
submission. The resources are allocated into a single pool (cluster) where the size can be dynamically adjusted up to a pre-configured limit (for security reasons). Theoretically this allows to grow the cluster to an arbitrary size, but since cloud resources are charged by hour this is undesirable. The goal is to find the "sweet spot" the balance between price and performance. Not utilized resources need also to be removed from the pool after a period of inactivity, taking into account that adding a resource to the pool has a high overhead (cost and time required for network transfer and deployment). Recently P-GRADE portal has been connected to 3G Bridge. As a result of this new development jobs of a parameter sweep applications can be seamlessly distributed between EGEE resources, desktop grid resources and cloud resources.
|Keywords||clouds, parameter sweep applications, portal, scheduler|
|URL for further information||http://www.lpds.sztaki.hu/|