[Solana’s 150-Millisecond Finality Upgrade, Alpenglow, Launches on Second Public Testnet] According to CoinDesk on September 26, Anza, Solana’s core software developer, announced on September 25 that the Alpenglow upgrade has gone live on the devnet; the testnet transition was completed the previous day. The Solana Foundation’s upgrade page confirms that Alpenglow is now operational on both public testnets. Alpenglow aims to reduce transaction finality from approximately 12.8 seconds to around 150 milliseconds by changing how validators reach consensus—validators now exchange votes directly, rather than submitting votes as transactions embedded in blocks, enabling consensus within just one to two voting rounds. This change will significantly reduce the total number of transactions containing validator votes, even if user activity remains unchanged; the Foundation has requested data providers to adjust their metrics accordingly. There is no confirmed mainnet launch date yet, and the 150-millisecond target remains a simulated goal, not yet validated under real-market conditions.
Solana Alpenglow Upgrade Launches on Second Public Testnet, Aims for 150-Millisecond Finality
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Summary
Solana's blockchain upgrade, Alpenglow, has launched on devnet, with the testnet transition completed on September 24. The Solana Foundation confirms the network upgrade is now active on two public testnets. The upgrade aims to reduce transaction finality to 150 milliseconds by altering how validators exchange votes. This blockchain upgrade is expected to decrease the number of transactions containing votes. The mainnet timeline has not yet been announced, and the 150ms target remains a simulation goal.
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