Duo: A High-Throughput Reconfigurable Datacenter Network Using Local Routing and Control

The performance of many cloud-based applications critically depends on the capacity underlying datacenter network. A particularly innovative approach to improve throughput in datacenters is enabled by emerging optical technologies, which allow dynamically adjust physical network topology, both an oblivious or demand-aware manner. However, such topology engineering, i.e., operation and control dynamic networks, considered complex currently comes with restrictions overheads. We present Duo, a novel reconfigurable rack-to-rack design realized simple efficient plane. Duo based well-known de Bruijn (implemented using small number circuit switches) key observation that this can be enhanced (''opportunistic'') links between its nodes. In contrast previous systems, has several desired features: i) It makes effective use supporting integrated multi-hop routing (paths combine static links). ii) uses work-conserving queue scheduling enables out-of-the-box TCP support. iii) employs greedy implemented standard IP longest prefix match forwarding tables. And iv) during topological reconfigurations, tables require only local updates, making ideal for networks. evaluate end-to-end packet-level simulations, comparing it state-of-the-art networks designs. show provides higher throughput, shorter paths, lower flow completion times high priority flows, minimal packet reordering, all existing transport layer protocols. also report proof-of-concept implementation Duo's data