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.The planned overhaul follows Solana's recent reduction in block-production times to about 200 milliseconds, another improvement designed to speed up transaction processing.However, Alpenglow addresses a different limitation: the delay between processing a transaction and the point at which the network considers it irreversible.Solana targets faster settlement for payments and financial marketsUnder Solana's existing consensus mechanism, validators establish finality by submitting votes as blockchain transactions, with agreement accumulating across multiple blocks.Alpenglow introduces a new system calle...