Concurrent leaders describe a design in distributed systems where multiple nodes simultaneously hold the role of processing or validating transactions. This approach contrasts with single-leader models, aiming to improve throughput and fault tolerance. Each leader processes a distinct subset of operations, coordinating to maintain overall system consistency.
Context
Discussions about concurrent leaders frequently appear in the context of scaling blockchain networks and enhancing transaction processing capabilities. Protocols employing sharding or parallel execution mechanisms often implement forms of concurrent leadership to overcome bottlenecks inherent in sequential processing. The primary challenge involves ensuring data consistency and preventing conflicts among concurrently operating leaders.
QuePaxa is the first asynchronous consensus protocol to match the low latency and cost of synchronous leader-based systems under normal operation, guaranteeing liveness under attack.
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