More on async message passing model 。Message delays are“arbitrary but finite", Different messages can take(very)different time to deliver. Each message will be delivered eventually. We do not know the maximum message delay. Algorithms for asynchronous systems are "event-based". Typical async algorithm:"upon receiving message...,do..." Typical sync algorithm:"for each round,do..." ☒ ☒ ☒ timeMore on async message passing model • Message delays are “arbitrary but finite”. • Different messages can take (very) different time to deliver. • Each message will be delivered eventually. • We do not know the maximum message delay. • Algorithms for asynchronous systems are “event-based”. • Typical async algorithm: “upon receiving message …, do …” • Typical sync algorithm: “for each round, do …” time