Peer Node Load Balancing. The Cdn And P2p Networks

The hybrid CDN and P2P network make a better network scalability, adaptability and robustness. The hybrid network provided service quality assurance for the distribution of large-scale heterogeneous network environment users and save server overhead as much as possible. Peer node load balancing is one of the key factors impact on the hybrid CDN and P2P network. The Peer node load balancing, mainly solve the query load imbalance problems.The existing load balancing algorithms caused by Peer node unbalanced requests, they are algorithm based on replication technology,algorithm based on rumor propagation,algorithm based on the awareness of the routing,algorithm based on the virtual node. Studied the replica placement; Replication algorithms based on the assumption—the future requests will come from the position of the elapsed requests, it lacks theoretical support.Load balancing of outside local area Peer node algorithm– Improve the CDN-PR replica algorithm. Improve the CDN-PR algorithm is because it makes an assumption that the future requests will come from the position of the elapsed requests, this assumption is correct sometimes, however, it is incorrect sometimes. To support the theory, import the Markov model predicting the position of the future requests, and secondly because the CDN-PR replica algorithm is proper for the CDN Peer node load balancing; Markov forecast the future requests based on the right now state of regional trends, predict future requests in a particular area may happen, provided the basis for the replica position decision making.Load balancing of local area Peer node algorithm - Improve the request retries algorithm. The improved request retries algorithm compute the node capacity by the Markov Model. It bring the node capacity in the heart beat package. Use the node capacity and TTL select nodes. Node with good performance will service more requests, node with bad performance will service less requests.Under the Peersim simulation platform, make the simulation and performance analysis on the load balancing of outside local area Peer node algorithm - Improved the CDN-PR replica algorithm. Make the simulation and performance analysis on the load balancing of local area Peer node algorithm - Improved request retries algorithm. The simulation reveal that both of the improved algorithm performance much better than the algorithm which is not improved.