Hey ! Presto : Edge-based Load Balancing for Fast Datacenter Networks

Presto is a host-based system design and implementation to reduce the negative impact of congestion arising from traffic imbalances on throughput, round trip times, and therefore flow completion times. Key design features are that it entails low, per-hypervisor overhead at sender, where loadbalancing is achieved by having the vSwitch send traffic along different paths using different labels. The approach combines known techniques with some new tricks, including