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Low-latency Atomic Broadcast in the Presence of Contention

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The proposed Atomic Broadcast algorithm can deliver messages in two communication steps, even if multiple processes broadcast at the same time. It tags all broadcast messages with the local real time, and delivers all messages in order of these timestamps. The Ω-elected leader simulates processes it suspects to have crashed (◇S). For fault-tolerance, it uses a new cheap Generic Broadcast algorithm that requires only a majority of correct processes (n > 2f) and, in failure-free runs, delivers all non-conflicting messages in two steps.

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This talk is part of the Computer Laboratory Opera Group Seminars series.

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