Synchronized network snapshots
Nofel Yaseen, John Sonchack, Vincent B. Liu · 2018
When monitoring a network, operators rarely have a finegrained and complete view of the network's state. Instead, today's network monitoring tools generally only measure a single device or path at a time; whole-network metrics are a composition of these independent measurements, i.e., an afterthought. Such tools fail to fully answer a wide range of questions. Is my load balancing algorithm taking advantage of all available paths evenly? How much of my network is concurrently loaded? Is application traffic synchronized? These types of concurrent network behavior are challenging to capture at fine granularity as they involve coordination across the entire network. At the same time, understanding them is essential to the design of network switches, architectures, and protocols.