Definition ∞ The consistency property in distributed systems, particularly blockchains, ensures that every successful transaction or data update brings the system from one valid state to another. This means all nodes in the network agree on the current state of the ledger after a transaction is processed. It is a fundamental aspect of maintaining data integrity and reliability across decentralized networks. Violations of consistency can lead to forks or discrepancies in transaction histories.
Context ∞ Discussions around blockchain scalability solutions, such as sharding or layer-2 protocols, often involve analyzing how they preserve or modify the consistency property. News articles covering blockchain upgrades or new protocol designs frequently address their impact on data consistency and finality. Future developments aim to optimize consistency guarantees while improving transaction throughput without sacrificing network integrity.