Partially synchronous describes a distributed system model where there are known upper bounds on message transmission delays and processing times, but these bounds are not always met. This model allows for periods of asynchrony where messages may take longer to arrive, interspersed with periods of synchrony. It offers a more realistic representation of real-world network conditions compared to strictly synchronous or asynchronous models. Many practical blockchain systems operate under this assumption to achieve consensus.
Context
The partially synchronous model is a fundamental assumption in the design and analysis of many blockchain consensus algorithms, impacting their performance and security guarantees. Discussions often involve proving the safety and liveness properties of protocols under these varying network conditions. News reports may refer to network congestion or temporary delays, which are characteristic of a partially synchronous environment. Future research will continue to refine protocols that perform optimally within these dynamic network constraints, ensuring robust operation of digital asset networks.
Adaptive Byzantine Agreement minimizes consensus overhead by scaling communication complexity to the actual number of network faults, not the theoretical maximum.
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