Anza Sets Oct. 21 for Solana’s Alpenglow Mainnet Upgrade
Anza scheduled Solana’s Alpenglow mainnet activation for Oct. 21 at about 14:50 UTC. The rollout is tied to a shift in how validators handle voting, with vote transactions moving off-chain and a fixed 0.8 SOL fee per epoch replacing the current daily cost for validators. The upgrade is described as replacing TowerBFT and aiming for about 150-millisecond finality, while the exact network impact after activation remains unknown.
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What it means
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In practice, vote transactions are set to leave blocks and the validator voting process is set to shift off-chain, while the network’s older TowerBFT setup is being replaced. What stays the same is that the upgrade is still a scheduled mainnet switch, not a completed measurement of final performance, and the fee change for validators is described as a fixed 0.8 SOL per epoch rather than the current daily 1.1 SOL cost.
What is still unknown is the actual network result after the switch and whether the target timing is reached in live use. The open question is resolved only by post-activation mainnet data, which would show how the validator changes and finality target work in practice.
Market reaction
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Has this happened before?
| When | What happened | Figure |
|---|---|---|
| 5 days ago | Hong Kong Plans Second Spot Solana ETF Listing on Oct. 13 event | 1 actors in common · 7 news media |
| 6 days ago | GTA 6 Leak Takes Bizarre Crypto Twist event | 1 actors in common · 3 news media |
| 7 days ago | Jito Sets Validator Requirements Before Solana’s Alpenglow Upgrade event | 1 actors in common · 2 news media |
| 7 days ago | Solana completes 200ms slot rollout on mainnet event | 1 actors in common · 2 news media |
| 8 days ago | Solana is about to halve its block times as final 200-millisecond upgrade nears event | 1 actors in common · 6 news media |
What could happen next
What the prediction markets currently price as likely. This is context, not a forecast of ours: there is money on it, and that is all we show.