During a recent All Core Developers Consensus (ACDC) call, Ethereum core developers outlined a tentative roadmap for the highly anticipated Fusaka upgrade, aimed at enhancing the blockchain’s scalability. Set for early December, the upgrade is expected to significantly boost the network’s performance with a series of follow-up changes designed to more than double the blob capacity shortly thereafter.
Before Fusaka is deployed on Ethereum’s mainnet, developers plan to conduct tests on three public test networks throughout October. If these tests proceed as planned, the mainnet activation is tentatively scheduled for December 3. Developers indicated that specific epoch numbers and timing details would be confirmed in the days leading up to the launch.
While Fusaka itself will not directly alter blob parameters, discussions during the call revealed a phased strategy for expanding blob availability through Blob Parameter Only (BPO) forks. One week after the Fusaka upgrade, BPO-1 will increase the blob capacity target from 6/9 to 10/15. Following that, BPO-2 will further raise the limit to 14/21 one week later. These adjustments are based on performance metrics gathered from the Fusaka Devnet-5 and are expected to enhance capacity without necessitating updates to client-side software.
Blobs, which were introduced in the Dencun upgrade in March, facilitate the efficient storage of substantial amounts of rollup transaction data, thereby reducing costs for users utilizing layer-2 scaling solutions.
Looking forward, Ethereum researcher Christine Kim, who provided insights from the call via social media platform X, pointed out that while additional BPOs are planned, only the first two were officially scheduled during this session. A comprehensive timeline detailing the Fusaka and BPO activations has been made available in Ethereum’s public notes.
The upcoming Fusaka rollout follows the Pectra upgrade released in May, which introduced changes to validator staking and new account abstraction features. This series of upgrades underscores Ethereum’s ongoing commitment to optimizing both scalability and network efficiency, positioning the blockchain for future growth.
