基于分层p2p系统的失效恢复机制的改进

the Improved mechanism of fault-tolerance based on Hierarchical p2p systems

在混合式p2p中为解决超级节点存在的单点失效问题,提高系统的可靠性,出现了具有两层(two-tier)分布式哈希表(dht)的分层p2p系统,该系统采用两套相对独立的机制来解决超级节点单点失效问题,系统开销比较大。针对上述原因,提出了在分层P2P系统中一个改进的失效恢复机制,其具有上述机制的优点,同时减少了建立起两个独立机制相应的开销,该机制是在超级节点和其所在域中加入了冗余信息,利用冗余信息可对系统进行快捷的失效恢复和信息更新,保持网络拓扑的稳定性,能有效地解决因超级节点的动态行为而导致系统可靠性和资源查找问题。

In order to solve the problem of single supernode＇s fault and improve the robust of the system in hybrid p2p system. Hierarchical Peer-to-Peer System owning two-tier DHTs is advanced, but the system needs running two different mechanism to solve the problem of single superuode＇s fault,the spending is much more. Therefore the improved mechanism of fault-tolerance in Hierarchical p2p systems is brought forward. This mechanism amalgamates the advantage of anterior mechanism and decrease the spending of building two different mechanism. It adds redundant information in the supernodes, fault-tolerance and updating information can be realized rapidly by redundant information, therefor it can keep topology steady and effectively solve the problem of system reliability and resource lookup.