Solana’s Alpenglow upgrade is set for October 21: finality time will drop from 12.8 seconds to 150 milliseconds.
On October 13, core developer Anza confirmed that Alpenglow will activate on mainnet on October 21 at around 14:50 UTC. This is the biggest change to Solana’s consensus mechanism in its history, following 18 months of development.
Key facts:
1. Mechanism: Votor will replace TowerBFT, which has been used since genesis. Validators will no longer submit votes as on-chain transactions. Instead, they will exchange votes directly with one another and aggregate them into quorum certificates, allowing blocks to be confirmed in one or two rounds of voting.
2. Performance: Finality time will fall from around 12.8 seconds to a target of 150 milliseconds—an improvement of roughly 85 times. Note: 150 milliseconds refers to finality, not block time (slots are around 200 milliseconds, which is a separate matter).
3. Side effect: With validator votes moved off-chain, Solana’s “transaction count” may drop sharply on activation day. This does not mean user activity has declined; the way transactions are counted has simply changed.
4. Price: SOL is down 9.34% over the past 7 days and is currently around $107.30. The market isn’t buying into the upgrade ahead of its launch.
Assessment: Alpenglow shifts the conversation from “throughput” to “time to certainty.” For exchanges, payments, and cross-chain bridges, what matters is the moment a transaction becomes “irreversible,” not the moment it “looks successful.” If the 150-millisecond target is met, Solana’s case for institutional-grade settlement will be much stronger. But a 25,000 SOL bug bounty shows that even the development team knows this change carries significant risks.
$SOL
Just my personal opinion; this is not investment advice.
On October 13, core developer Anza confirmed that Alpenglow will activate on mainnet on October 21 at around 14:50 UTC. This is the biggest change to Solana’s consensus mechanism in its history, following 18 months of development.
Key facts:
1. Mechanism: Votor will replace TowerBFT, which has been used since genesis. Validators will no longer submit votes as on-chain transactions. Instead, they will exchange votes directly with one another and aggregate them into quorum certificates, allowing blocks to be confirmed in one or two rounds of voting.
2. Performance: Finality time will fall from around 12.8 seconds to a target of 150 milliseconds—an improvement of roughly 85 times. Note: 150 milliseconds refers to finality, not block time (slots are around 200 milliseconds, which is a separate matter).
3. Side effect: With validator votes moved off-chain, Solana’s “transaction count” may drop sharply on activation day. This does not mean user activity has declined; the way transactions are counted has simply changed.
4. Price: SOL is down 9.34% over the past 7 days and is currently around $107.30. The market isn’t buying into the upgrade ahead of its launch.
Assessment: Alpenglow shifts the conversation from “throughput” to “time to certainty.” For exchanges, payments, and cross-chain bridges, what matters is the moment a transaction becomes “irreversible,” not the moment it “looks successful.” If the 150-millisecond target is met, Solana’s case for institutional-grade settlement will be much stronger. But a 25,000 SOL bug bounty shows that even the development team knows this change carries significant risks.
$SOL
Just my personal opinion; this is not investment advice.