A Peer-to-Peer Information Service for Grid

Information Services are fundamental blocks of the Grid infrastructure. They are responsible for collecting and distributing information about resource availability and status to users: the quality of these data can have a strong impact on scheduling algorithms and application performance. Many popular information service have a centralized structure. This clearly introduces problems related to information updating and tolerance to faults. Also, in very large configurations, scalability can be an issue. In this work, we present a Grid Information Service (GIS) based on peer-to-peer (P2P) technology. Our system offers a fast propagation of information and has a high scalability and reliability. We implemented our system complying to the OGSA standard using the Globus Toolkit 3. Our system can run on Linux and Windows systems, with different configurations, so to trade off between redundancy (reliability) and cost.