Ethereum continues to make major innovations in blockchain technology development. One of its latest steps is the Fusaka upgrade, which, according to Vitalik Buterin, will introduce a new mechanism called PeerDAS (Peer Data Availability Sampling). This technology is expected to improve Ethereum’s scalability while addressing challenges related to data availability.
With the upgrade scheduled for release on December 3, 2025, Ethereum is moving closer to its vision of a faster, more efficient, and more user-friendly blockchain, particularly for Layer 2 (L2) users, which currently dominate the ecosystem.
What Is PeerDAS and Why Is It Important for Ethereum?
PeerDAS is a revolutionary approach to Ethereum architecture. Instead of downloading the entire blockchain data, nodes only need to retrieve small chunks of data. These chunks are then verified using statistical sampling, ensuring their availability across the network.
Vitalik Buterin emphasized that this concept is key to Ethereum’s scalability, particularly in supporting the growth of Layer 2 rollups and even paving the way for future Layer 1 (L1) upgrades.
With PeerDAS, the Ethereum blockchain will be lighter, as no single node is required to store the entire dataset. This will reduce node load, speed up validation processes, and support more transactions per second.
Fusaka Upgrade: Part of EIP-7594
PeerDAS technology itself originates from Ethereum Improvement Proposal (EIP) 7594**, introduced in January 2024. This proposal aims to reduce the burden on Ethereum nodes by ensuring only a portion of the data needs to be downloaded.
With this new mechanism, Ethereum will:
- Become more efficient in data management,
- Be able to handle more transactions,
- Maintain global data availability.
This innovation not only impacts Ethereum’s current performance but also lays a crucial foundation for the future of blockchain scalability.
Blob Capacity Increase in Fusaka Upgrade
In addition to introducing PeerDAS, the Fusaka upgrade also brings significant improvements to Ethereum’s blob capacity.
Blobs are a specialized type of data storage first introduced with the Dencun upgrade in March 2024. At the time, the maximum blob capacity was six per block. With Fusaka, that number will be increased to nine blobs per block.
Vitalik Buterin explained that the blob capacity increase will:
- Reduce transaction fees,
- Strengthen the efficiency of rollups,
- Address the data availability limitations that have been a major obstacle.
This is good news for developers and users of Layer 2 rollups, as lower fees and improved efficiency will accelerate Ethereum’s global adoption.
Vitalik Buterin: Cautious but Optimistic
In his explanation, Vitalik Buterin emphasized the importance of thorough testing of these new features. He stated that while the Fusaka upgrade will have a significant impact, Ethereum must remain cautious to ensure the network remains stable and secure.
However, despite this conservative stance, Buterin remains optimistic. He believes that the combination of PeerDAS and increased blob capacity will usher Ethereum into a new era, one where the blockchain can achieve massive scalability without sacrificing decentralization or security.
“Buterin believes this is a crucial step towards Ethereum’s future significant growth,” reads the official Ethereum community statement.
Conclusion: Fusaka is a Key Milestone in Ethereum’s Evolution
The Fusaka upgrade, with its PeerDAS feature and increased blob capacity, is part of Ethereum’s long-term strategy to address scalability challenges.
For the blockchain community, this means:
- Faster transactions**,
- Lower fees**,
- A more robust Layer 2 ecosystem**,
- Expanded global adoption of Ethereum**.
With a clear roadmap and full support from developers, Ethereum is expected to enter a significant growth phase** following the release of the Fusaka upgrade.
If successful, Ethereum will become not only the largest blockchain, but also the most efficient, ready to embrace the future of Web 3.