Benoit Hudzia

TreeP: A Tree Based P2P Network Architecture

In this paper we proposed a hierarchical P2P network based on a dynamic partitioning on a 1-D space. This hierarchy is created and maintained dynamically and provides a grid middleware (like DGET) a P2P basic functionality for resource discovery and load-balancing. This network architecture is called TreeP (Tree based P2P network architecture) and is based on a tessellation of a 1-D space. We show that this topology exploits in an efficient way the heterogeneity feature of the network while limiting the overhead introduced by the overlay maintenance. Experimental results show that this topology is highly resilient to a large number of network failures

Security Framework for P2P Based Grid Systems

Grid and P2P systems enable users to share resources across organization boundaries. A strong security system is an integral component of grid middleware to enable secure resource sharing at a very large scale. P2P grid systems combine approaches from both worlds to share resources at a very large scale. P2P grid systems have a different set of security requirements contrary to the traditional server based centralized grid systems. This paper proposes a decentralized security framework for P2P grid systems. This framework is part of a P2P based data grid middleware DGET (data grid environment and tools)

THON: A Tessellation-based Hierarchical Overlay Network for DGET Grid Middleware

P2P and grid computing are two paradigms that are increasingly used in todays computing environments; their potential to provide better quality of service to users is very promising compared to the cost involved. This paper presents a hierarchical virtual network topology built on top of a physical one, which is used to manage distributed resources in a grid environment. The virtual topology defines an efficient and robust virtual machine, which will serve as a distributed computing platform. This topology is called THON (tessellation-based hierarchical overlay network) and is the successor of the Treep topology. THON is exploited in DGET, a data-grid middleware environment, and provides P2P resource discovery and load balancing. Here, we present the virtual topology theoretically and we show that this topology is very scalable, robust, load-balanced, and easy to construct and maintain. The topology efficiently exploits the heterogeneity of the network while limiting the overhead introduced by the overlay maintenance.