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All-optical switching networks have been considered a promising candidate forthe next generation data center networks thanks to its scalability in databandwidth and power efficiency. However, the bufferless nature and the nonzerorecon- figuration delay of optical switches remain great challenges indeploying all-optical networks. This paper considers the end-to- end schedulingfor all-optical data center networks with no in- network buffer and nonzeroreconfiguration delay. A framework is proposed to deal with the nonzeroreconfiguration delay. The proposed approach constructs an adaptive variant ofany given scheduling policy. It is shown that if a scheduling policy guaranteesits schedules to have schedule weights close to the MaxWeight schedule (andthus is throughput optimal in the zero reconfiguration regime), then thethroughput optimality is inherited by its adaptive variant (in any nonzeroreconfiguration delay regime). As a corollary, a class of adaptive variants ofthe well known MaxWeight policy is shown to achieve throughput optimalitywithout prior knowledge of the traffic load. Further- more, through numericalsimulations, the simplest such policy, namely the Adaptive MaxWeight (AMW), isshown to exhibit better delay performance than all prior work.

Adaptive Policies for Scheduling with Reconfiguration Delay: An End-to-End Solution for All-Optical Data Centers