Solana has begun rolling out Alpenglow on testnet, moving its planned blockchain consensus overhaul into a public testing environment. The upgrade targets finality of approximately 150 milliseconds, down from roughly 12.8 seconds under TowerBFT, the system Solana validators currently use to agree on blocks.
Alpenglow replaces the consensus layer while leaving the Solana Virtual Machine, transactions, programs, and fees unchanged. Its first phase introduces Votor, which replaces the vote transactions validators currently put onchain with votes sent directly between validators. Those votes are combined into certificates that can finalize a block within one or two voting rounds, cutting the wait for an irreversible transaction by approximately 99%.
Anza, the developer behind Solana's Agave validator software, said that testnet was entering the rollout process, ahead of planned deployments on devnet and eventually mainnet-beta. The migration requires validators and infrastructure providers to adjust systems that stream blocks, track votes, or rely on Solana's existing commitment structure.
Alpenglow will later add Rotor, a replacement for Turbine, Solana's system for distributing block data across the network. Rotor is scheduled separately, leaving Votor and faster finality as the rollout's immediate focus.
Network Activity Accelerates Alongside Technical Upgrades
The consensus overhaul follows additional performance improvements. Solana activated Transaction V1 this month, lifting maximum transaction size to 4,096 bytes from 1,232, while its slot-time roadmap has progressively cut the target from 400 milliseconds toward 200 milliseconds.
SOL traded around $117 as of the article's publication after reaching almost $120 earlier in the week, putting the token around its strongest level since late January. The token has gained roughly 25% over the past month.
Real-world assets on the Solana network reached approximately $4.6 billion in early September, extending a climb that took the sector through $4 billion for the first time in August. Trading activity has also accelerated, with Solana decentralized exchanges recording approximately 208 million individual spot trades in the week ending September 13. Jupiter accounted for more than 80 million trades during September, up 38% from the previous month.
