Codes Can Reduce Queueing Delay in Data Centers
In this paper, the authors quantify how much codes can reduce the data retrieval latency in storage systems. By combining a simple linear code with a novel request scheduling algorithm, which they call Blocking-one Scheduling (BoS), they show analytically that it is possible to reduce data retrieval delay by up to 17% over currently popular replication-based strategies. Although in this paper, they focus on a simplified setting where the storage system stores a single content, the methodology developed can be applied to more general settings with multiple contents. The results also offer insightful guidance to the design of storage systems in data centers and content distribution networks.