The upgrade replaces Solana’s existing TowerBFT proof-of-stake consensus mechanism and proof-of-history timestamping system with new components called Votor and Rotor.
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Solana Labs spinout Anza proposes Alpenglow, 'the biggest change to Solana’s core protocol'
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Alpenglow introduces two core components - Votor, which manages voting and block finalization, and Rotor, which replaces Solana’s proof-of-history with a more efficient data dissemination protocol.
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Alpenglow is a proposed consensus upgrade for the Solana blockchain that replaces both the TowerBFT finalization system and the proof-of-history timestamping mechanism.
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