Download Agents and Peer-to-Peer Computing: Third International by Arturo Crespo, Hector Garcia-Molina (auth.), Gianluca Moro, PDF

By Arturo Crespo, Hector Garcia-Molina (auth.), Gianluca Moro, Sonia Bergamaschi, Karl Aberer (eds.)

Peer-to-peer (P2P) computing is attracting huge, immense media cognizance, spurred by means of the recognition of dossier sharing platforms equivalent to Napster, Gnutella, and Morpheus. The friends are self sustaining, or as a few name them, top notch electorate. P2P networks are rising as a brand new dispensed computing paradigm for his or her power to harness the computing energy of the hosts composing the community and make their under-utilized assets to be had to others. even if researchers engaged on disbursed computing, multiagent platforms, databases and networks were utilizing comparable techniques for a very long time, it's only lately that papers stimulated by means of the present P2P paradigm have begun showing in high quality meetings and workshops. learn in agent platforms specifically seems to be so much proper simply because, due to the fact that their inception, multiagent structures have constantly been regarded as networks of comrades. The multiagent paradigm can hence be superimposed at the P2P structure, the place brokers include the outline of the duty environments, the decision-support features, the collective habit, and the interplay protocols of every peer. The emphasis during this context on decentralization, consumer autonomy, ease and velocity of development that offers P2P its merits additionally results in major power difficulties. so much well known between those difficulties are coordination, the power of an agent to make judgements by itself activities within the context of actions of alternative brokers, and scalability, the price of the P2P platforms lies in how good they scale alongside a number of dimensions, together with complexity, heterogeneity of comrades, robustness, site visitors redistribution, and so on.

This quantity provides the absolutely revised papers provided on the 3rd foreign Workshop on brokers and Peer-to-Peer Computing, AP2PC 2004, held in big apple urban on July 19, 2004 within the context of the 3rd overseas Joint convention on self sustaining brokers and Multi-Agent structures (AAMAS 2004). the quantity is equipped in topical sections on P2P networks and seek functionality, emergent groups and social behaviours, semantic integration, cellular P2P platforms, adaptive platforms, agent-based source discovery, in addition to belief and reputation.

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Additional info for Agents and Peer-to-Peer Computing: Third International Workshop, AP2PC 2004, New York, NY, USA, July 19, 2004, Revised and Invited Papers

Example text

E. ) During traditional web browsing, a client initiates an HTTP REQUEST which is satisfied with an HTTP RESPONSE by the server (see Figure 4). In the DynamicWeb system, however, web browsers and web servers are indirected through the DHQ, see Figure 5. HTTP requests become DHQ push operations, and the resulting HTTP response is popped by the browser. ”, in other words how much overhead does the DHQ system introduce. In the indirect Distributed Hash Queues: Architecture and Design 35 +7735HTXHVW +7735HSO\ %URZVHU :HE6HUYHU Fig.

BlockingPop queue name blocks until the queue has at least one element then returns that element. 32 C. Yoshikawa, B. Chun, and A. Vahdat NAT Node A NAT Node B Gateway Service Gateway Service DHQ Service DHQ Service Naming Service Naming Service Pastry Pastry Fig. 2. This figure shows the layered structure of the DHQ system. The arrows indicate communication between layers and between entities. The DHQ and Naming services are implemented as Pastry applications and communicate strictly through Pastry.

1 Introduction P2P (Peer-to-peer) systems tend to be highly decentralized. They typically consist of many nodes, which are symmetric in function, but unreliable and heterogeneous. The increasing popularity of peer-to-peer file sharing systems has paved a way to many interesting research problems. The problem of finding data is at the heart of any decentralized P2P system [2][5] [11]. It is not addressed well by most popular systems currently in use, and it provides a good example of how the challenges of designing P2P systems can be addressed.

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