MTM: A Reliable Multiple Trees Multicast for Data Center Network

Packet loss degrades the performance of multicast in various cloud services and reliability still plays a critical role in group communication within data center network (DCN). However, existing reliable multicast algorithms either cannot satisfy the stringent requirement of minimizing repair delay or do not utilize network bandwidth effectively. In this paper, we present MTM, a novel reliable multicast for DCN. By leveraging plentiful link resources in DCN, MTM constructs multiple edge-disjoint multicast trees to transmit data concurrently and builds isolated repair path between adjoining group members belonging to different delivery trees respectively for packet recovery. Therefore, MTM improves error resilient ability in the presence of various levels of packet loss. Furthermore, we propose the implementation of MTM in BCube. Extensive experiments are conducted and the evaluation results demonstrate clearly that MTM achieves low recovery delay and high application throughput.