Solana sets October 21 for massive Alpenglow upgrade that could make transactions 99% faster to finalize

Solana will replace its blockchain's consensus system on Oct. 21, targeting transaction finality in approximately 150 milliseconds. On Oct. 13, Anza, the blockchain network's core developer, announced the mainnet activation date, setting the stage for one of the most significant infrastructure changes in Solana's history. The upgrade, known as Alpenglow, will replace TowerBFT, the mechanism that currently takes approximately 12.8 seconds to finalize transactions. If successful, the change would reduce finality times by nearly 99%, bringing the network closer to instantaneous settlement.

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