The state-of-the-art Solutions PDQ [SIGCOMM,121 fAbric[SIGCOMM'13 PASE [ SIGCOMM'141 All assume prior knowledge of ftow size imformrationtto approximate ideal preemptive Shortest Job First(SJF) with customized network elements Hard to deploy in practiceThe State-of-the-art Solutions • PDQ [SIGCOMM’12] • pFabric [SIGCOMM’13] • PASE [SIGCOMM’14] • … All assume prior knowledge of flow size information to approximate ideal preemptive Shortest Job First (SJF) with customized network elements Hard to deploy in practice 8