Definition ∞ Replica logs are ordered records of operations or state changes maintained by individual copies, or replicas, within a distributed system. Each replica keeps its own log to track the sequence of events it has processed, ensuring that it can recover its state or participate in consistency protocols. These logs are crucial for fault tolerance and data durability, allowing a system to continue functioning even if some replicas fail. They provide an auditable history of actions.
Context ∞ In the context of blockchain and distributed ledger technologies, replica logs are analogous to the distributed ledger itself, where each full node maintains a copy of the transaction history. News discussing consensus mechanisms or data synchronization often refers to the integrity and consistency of these logs across the network. Maintaining accurate and synchronized replica logs is fundamental to the security and immutability of decentralized systems.
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