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An Innovative Approach to Content Search Across P2P Inter-Networks Potharaju S.R.P Saradhi

An Innovative Approach to Content Search Across P2P Inter-Networks Potharaju S.R.P Saradhi Mohmed Nazuruddin Shaik Potharaju S R Aditya Under The Guidance of Mr . P. Barath Asst.Prof, SCS Vellore Institute of Technology. Definition

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An Innovative Approach to Content Search Across P2P Inter-Networks Potharaju S.R.P Saradhi

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  1. An Innovative Approach to Content Search Across P2P Inter-Networks Potharaju S.R.P Saradhi Mohmed Nazuruddin Shaik Potharaju S R Aditya Under The Guidance of Mr. P. Barath Asst.Prof, SCS Vellore Institute of Technology

  2. Definition • A distributed architecture consisting of a collection of resources performing a distributed function is called a peer to peer architecture. • P2P computing is the sharing of computer resources and services by direct exchange between systems.

  3. Aim • To effectively use peers to share their content with topologically closer peers. • To reduce the number of redundant messages in the network without compromising on the search performance. • To effectively utilize the topology of the underlying network to increase the performance of the query routing algorithm.

  4. Problem with the content search strategies in the network B C Packet A

  5. Approach • To design a new algorithm for converting any physical network into a conceptual network. • To implement a new query routing algorithm in the derived conceptual network to locate data present in the actual physical network.

  6. Proposed System Architecture • Peers in the system act as client peers and super-peers in different hierarchies. • Super-peers act as local search hubs, proxying search requests on behalf of these peers. • Super-peers are connected with each other and organized amongst themselves into a backbone overlay network on the super-peer tier.

  7. Multi-tier Architecture

  8. Advantages of Proposed Architecture • The hierarchical structure of this system combines advantages of both centralized and pure P2P systems. • It combines the efficiency of a centralized search with the • Autonomy • Load balancing and • Robustness • provided by the distributed search mechanisms.

  9. Advantages of Proposed Architecture (Contd...) • The proposed architecture distributes the load on the central server to many super-peers. • No single super-peer is required to handle a very large load. • Nor will one peer become a bottleneck or a point of failure for the entire system.

  10. Selection of Nearest Super-peer • Let dist(p,q)represent the underlying distance between peers pand q. • Let distRTT(p,q) to represent the detected RTT value and distTTL(p,q) to represent the detected TTL value. • Let d be a predefined value to denote the latency difference of two paths.

  11. Selection of Nearest Super-peer (Contd...) • Given peers p, q, s, t then the distance can be compared using the following concept: • If |distRTT(p,q)- distRTT(s,t)|>d then • If distRTT(p,q)≥ distRTT(s,t) then • dist(p,q)> dist(s,t) • Else dist(p,q)< dist(s,t) • Else If distTTL(p,q)≥ distTTL(s,t) then • dist(p,q)> dist(s,t) • Else dist(p,q)< dist(s,t)

  12. The Proposed Neighbour Information Based Algorithm *Ai: The identifier of peer i. *hopt: the network distance that is t hops distance from the specific central peer. *Nbr(Ai, hopt): The neighbour set of Ai, and the shortest distance between peers in the set and Aiis exact t hops. *Unnecessary message: The repeated flooding query message received by a peer.

  13. Rules for Predicting Unnecessary Messages • Aiis father of Aj, that is to say Ajhas received message from Ai . • Ajwill send the message to its neighbours (Ak) except Ai. • Then Ajcan predict that other peers may also send the messages to Ak, define these peers (including Aj) as Possible Father Set (PFS) of Ak, expressed as : • PFS(Ai, Aj, Ak)={Nbr(Ak, hop1)Nbr(Ai, hop1)}

  14. Unnecessary Message prediction Rules Rule 1: if Ak Nbr(Ai, hop1), then Msg(Aj, Ak) must be unnecessary message. Rule 2: if Ak Nbr(Ai, hop1), and PFS(Ai, Aj, Ak) ≠ {Aj}, then Msg(Aj, Ak) is possible unnecessary message, or else it is necessary message.

  15. Proposed Neighbour Information Based Routing Algorithm Step1: If Ai has received the query before, drop the query. Step2: If the query is satisfied, then return results to sponsor. Step3: If TTL is not more than zero, drop the query.

  16. Proposed Neighbour Information Based Routing Algorithm (Contd...) • Step4: For each Aj Nbr(Ai, hop1), predicts the validity of Msg(Ai,Aj) by UMP. • If it is a necessary message, then send it to Aj; • if it is unnecessary message; do not send it; • if it is a “possible” unnecessary message judged by UMP Rule2 then do not send it.

  17. Advantages of The Proposed Approach • This algorithm does not reduce the search scope of the general flooding algorithm . • The node utilizes only its local NIT. • No wastage of time in exchanging information between nodes to decide the valid neighbours. • Retrieving information from local database is around five times faster than exchanging topology information

  18. Conclusion • Our simulations suggest that • unnecessary messages make up to 27% in different kinds of network topologies • algorithm attains an efficiency of 73%of necessary messages.

  19. Thank You

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