The Ethereum Fulu-OSAKA upgrade (or Fusaka) expected next week will begin the final increase in blob capacity. As a result, PeerDAS (Peer Data Availability Sampling) makes data more accessible to all Ethereum-based L2s.
Ethereum Fusaka addresses blob space bottleneck issue
The Ethereum Fusaka hard fork (abbreviated as Fulu-OSAKA) scheduled for December 3rd will significantly enhance the scaling of the blob space. Cryptocurrency researcher and investor Anthony Sasano said in a tweet that it would be beneficial for Ethereum (ETH) at that stage as it has reached its current limit.
The current blob target on Ethereum is 6 blobs per block, and the network is almost at capacity.
Fusaka goes live on December 3rd and significantly improves the scalability of BLOBs with PeerDAS.
Blob growth is being rolled out in stages to avoid overload… pic.twitter.com/zMHM3I7jFW
— sassal.eth/acc 🦇🔊 (@sassal0x) November 25, 2025
Currently, Ethereum (ETH) can only handle six BLOBs (Binary Large Objects, data chunks designed to optimize L1/L2 data logistics) per single block. This limit will be gradually increased once Pectra goes live on mainnet.
The migration will be carried out in stages to avoid overloading the Ethereum (ETH) network. The first fundraiser will take place on December 9th, six days after Fusaka.
This upgrade introduces PeerDAS (Peer Data Availability Sampling), which is designed to allow nodes on the EVM blockchain to verify that data is available, eliminating the need to download the entire blockchain.
As previously covered on U.Today, PeerDAS is one of the most anticipated upgrades to the Ethereum (ETH) ecosystem since Pectra.
This is expected to alleviate the most dangerous scaling bottlenecks and make L2 operations even more resource efficient.
Full rollout is expected to be completed by January 7th
The second “Blob Parameter Only (BPO)” fork went live on January 7th and increases the number of blobs per block to 14, an increase of over 133% compared to current Ethereum (ETH).
The community expects the rollout of Fusaka (followed by the addition of more BPO forks in 2026 and a 200% increase in available gas limits) to be a major catalyst for EVM L2 adoption.
In late 2026, Fusaka’s development will be powered by Ethereum Gloas-Amsterdam, a mega upgrade with 25 EIPs. “Gramsteldam” is finally scheduled to reduce Ethereum (ETH) block time by 50%.
