OTF: Optical Torus-based fault-tolerant DCN

Data center performance is a function of three features; bandwidth, latency, and reliability. Increasing bandwidth and reducing power consumption can be accessed through optical technology adopted in recent designs. However, the problem of fault tolerance in optical interconnection networks has been raised less. So, in this paper, we propose a fault-tolerant, scalable, and high-performance optical architecture which takes advantages of novel passive photonic switches and routing strategy in order to provide non-blocking and low-power data communication intra data centers. Due to the passive optical components utilized in the proposed optical Torus, OTF, in comparison to WaveCube with the same topology, it results in less power consumption, transmission latency, and cost. Moreover, the proposed fault-tolerant method, which can be adopted in any arbitrary network, leads to throughput increment 40% more than the WaveCube at the presence of network failure, with the same wiring complexity and less latency and power consumption.