Improvement of TCP for parallel networks in distributed computing cluster

In distributed cluster computing system, high performance network communication between nodes is significant. Performance-based path selection (PBPS) can use different features and performance of each network of parallel networks in the cluster to achieve optimal communication efficiency. We improve TCP and increase its function to realize PBPS for cluster communication, because of its wide application and the record of round trip time that can be used for PBPS. These improvements have better performance when there is a great deal of communication.