Topology aware flow scheduling for data center network

Data center technology is growing in last few years because it can accommodate variety of applications. Some data-intensive applications are deadline sensitive and require minimum flow completion time. In literature, many proposals exist for either reducing average flow completion time or the long tail of flow completion. The state of art proposal is pFabric [3] with shortest remaining size first scheduling. Data centers are generally built on layer 3 switching to reduce broadcast domain. Hosts are assigned IP address hierarchically to reduce the size of forwarding table across all data center switches. With the help of destination IP address, a sender can find the distance to the receiver. In the proposed protocol, Topology Aware pFabric (TAP), the distance information with remaining size of flow is used for flow prioritization. TAP outperforms existing protocol pFabric. The simulation results show that prioritizing long distance flows1 further reduces average flow completion time and minimizes the total number of timeout events.