Method and system for searching data in P2P network base on distributed Hash table

Abstract

The invention discloses a method for searching data in the P2P network which is based on distribution hash table; the P2P network comprises at least two layers of networks which are overlapped; every overlapped network comprises at least one node and the identifier of the node comprises a domain identifier and a local identifier; the neighboring two overlapped networks transfer data by super-nodes; the method comprises that a first super-node of the upper overlapped network receives an inquiry request; the inquiry request comprises the domain identifier and local identifier of the data package which needs to be searched; a second super-node which is provided with the same domain identifier as the identifier of the inquiry request is searched from the first super-node in the upper overlapped network; the data node is searched according to the local identifier in the inquiry request in the lower overlapped network in which the second super-node is located. The invention also discloses the corresponding system and node. By adopting the invention, different key words are adopted for inquiring in different layers of the overlapped networks and the inquiry efficiency can be improved.

Description

technical field [0001] The present invention relates to the technical field of computer networks, in particular to a method and system for searching data in a peer-to-peer (Peer to Peer, P2P) network based on a distributed hash table (Distributed Hash Table, DHT). Background technique [0002] Different from the traditional client (Client) / server (Server) model network, each participating node in the P2P network is peer-to-peer, and each node shares a part of its own hardware resources (such as processing power, storage capacity, etc.) , network link capabilities, printers, etc.), the services and content provided by these shared resources through the network can be directly accessed by other peer nodes without going through an intermediate entity. That is to say, the participating nodes in the P2P network are both resource (such as service and content) providers (equivalent to servers) and resource acquirers (equivalent to clients). [0003] In the new generation of P2P ...

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Problems solved by technology

[0022] The purpose of the embodiments of the present invention is to provide a method and system for searching data in a peer-to-peer network based on a distributed hash table, so as to overcome the low query efficiency caused by always using keywords of the same length for query in the prior art. high disadvantage

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