Solana is moving ahead with a governance vote that could rewrite the network’s most basic rules. The proposal, known formally as SIMD 326 but referred to almost exclusively as “Alpenglow,” would replace the blockchain’s Proof-of-History and TowerBFT consensus with a new system built for speed, simplicity, and durability.
The pitch is straightforward in concept, less so in execution. Instead of the layered, gossip-heavy messaging Solana uses now, the Alpenglow design puts validators into direct conversation.
A new protocol, Votor, handles the voting: in good conditions, a block can be finalized in a single round of votes, taking just 100 to 150 milliseconds. That’s not a marginal gain. TowerBFT’s current finality sits around 12.8 seconds.
The first stage of the rollout is about the voting and finalization logic. Rotor, a new block distribution method meant to replace Turbine, will come later if it passes its own review. Alpenglow also adds a system of certificates that let validators notarize, skip, or finalize blocks, depending on what comes through in the vote.
Developers have been blunt about why this is needed. TowerBFT can be slow under stress, it lacks formal safety guarantees, and it leaves room for validators to delay votes for strategic reasons.
The upgrade would install a “20+20” resilience model, the network could still run if one-fifth of validators went rogue and another fifth simply dropped offline.
To remove the incentives for vote gamesmanship, the design drops on-chain voting fees in favor of a Validator Admission Ticket, a kind of entry key that keeps participation fair.
The governance process is underway now. Discussion runs through epoch 838. Stake weights get recorded in epoch 839. Between epochs 840 and 842, validators can claim voting tokens through an adapted Jito Merkle Distributor and send them to one of three accounts: Yes, No, or Abstain. Two-thirds of Yes over No votes are required to pass, with a one-third quorum. Abstentions count toward that quorum.
If it clears, Alpenglow would push Solana into Web2-level response times, making it attractive for high-frequency trading systems, real-time games, and other use cases where milliseconds matter. The technical paper is already public. The decision now rests with the validator set, and the clock is ticking.