Expanding Across Time to Deliver Bandwidth Efficiency and Low Latency

Explore a conference talk that delves into Opera, a dynamic network architecture designed to deliver both low-latency and high-bandwidth packet delivery in datacenters. Learn how Opera utilizes multi-hop forwarding for latency-sensitive traffic while providing near-optimal bandwidth for bulk flows through time-varying source-to-destination circuits. Discover the innovative approach of rapid and deterministic network reconfiguration that allows Opera to implement an expander graph at any given moment while offering bandwidth-efficient single-hop paths between all racks over time. Understand how this design supports low-latency traffic with flow completion times comparable to cost-equivalent static topologies, while delivering up to 4x the bandwidth for all-to-all traffic and supporting up to 60% higher load for published datacenter workloads. Gain insights into the challenges, expander properties, highlevel design principles, matching properties, and practical considerations of implementing Opera in real-world datacenter environments.

Introduction
Challenges
Expanders
Inverse properties
Highlevel design properties
Matching properties
Staggering switches
Data center traffic
Packet level simulations
Practical considerations