Almost) No Cost Clock Synchronization

摘要: We show how synchronized clocks can be realized in a distributed system as byproduct of common communication paradigm where processors periodically perform broadcasts. Our approach decouples the precision concern-limiting much correct differ from each other-and accuracy any clock real time-of synchronization. Given that guarantees only precision, we develop protocol whereby high achieved on demand. In this manner, ``lazy'''' obtain incurs cost when needed while keeping basic synchronization procedure extremely simple and cheap.