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Solana Alpenglow (SIMD-0326) to Make Fundamental Changes to Network - U.Today
Alpenglow system introduction
The proof-of-history and TowerBFT systems from Solana are replaced by Alpenglow, a contemporary framework emphasizing fault tolerance, latency reduction and streamlined consensus logic. Votor, its main component, is a simple voting system that, depending on network conditions, completes blocks in one or two rounds.
By doing away with the excessive gossip traffic linked to TowerBFT, this method reduces bandwidth consumption and provides quicker block confirmation. Direct voting between validators will take place, and results will be certified by combining cryptographic proofs.
Eventually, Rotor, a complementary protocol, will take the place of Turbine for data distribution, however this will be introduced in a separate upgrade. The limitations of TowerBFT, which introduced high latency and lacked formal safety guarantees, are the driving force behind Alpenglow.
What does new system offer?
The new system offers better incentives for validators, reduced communication overhead and increased economic fairness, all of which are based on recent distributed systems research. Even in the event that 20% of validators engage in malevolent behavior and another 20% choose not to participate, the protocol can continue to function thanks to a 20+20 resilience model.
Off-chain vote aggregation will be used by validators in place of on-chain vote transactions, which will save fees and computational expenses. The new Validator Admission Ticket (VAT) is set at 1.6 SOL per epoch.