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This paper proposes a coordinated load management protocol for Peer-To-Peer (P2P) coupled federated Grid systems. The participants in the system, such as the resource providers and the consumers who belong to multiple control domains, work together to enable a coordinated federation. The coordinated load management protocol embeds a logical spatial index over a Distributed Hash Table (DHT) space for efficient management of the coordination objects; the DHT-based space serves as a kind of decentralized blackboard system. The authors show that their coordination protocol has a message complexity that is logarithmic to the number of nodes in the system, which is significantly better than existing broadcast based coordination protocols.
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