State of Content Routing through the DHT: Latest Developments & Measurement Results
Yiannis Psaras
About this talk
Yiannis Psaras presents measurement results from two major IPFS DHT events: the Hydra dial-down and a January 2023 incident where roughly 60% of network nodes became unresponsive due to misconfigured Resource Manager defaults. He describes ProbeLab's controlled experimental setup of geographically distributed probes that publish and retrieve random CIDs, and reports that disabling the 2,000 Hydra heads produced a roughly 10-13% latency increase, broadly matching expectations. The Resource Manager incident caused an additional 9-15% slowdown on put operations and 7-20% on get operations, which was largely recovered after Kubo v0.18.1 shipped better defaults and around 8,000 nodes upgraded within ten days. Psaras also shares current DHT lookup performance numbers showing significant regional disparities between EU/US East/US West clients and other locations, along with observations on peer ID rotation churn and the shift toward a more stable population of long-lived online nodes.