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- Ethereum rises 9% as the Fusaka upgrade prepares to boost scalability and strengthen L2 data flow

- PeerDAS will cut node storage needs and expand rollup capacity, improving network efficiency

- New gas controls and UX updates aim to stabilize performance and support future growth

Ethereum (CRYPTO: $ETH ) is posting a strong move ahead of its Fusaka activation, gaining 3% over the past 24 hours and trading near $3,100. Market data also shows more than $28.91 billion in daily volume, supported by Bitcoin-led recovery across the broader market.

The upcoming upgrade has added another catalyst, as developers and analysts position Fusaka as Ethereum's most consequential improvement since Pectra. The network will activate the upgrade at slot 13,164,544 on December 3, 2025, merging Osaka execution changes with the Fulu consensus layer.

PeerDAS Reshapes L2 Data Flow

Fusaka's headline feature, Peer Data Availability Sampling, marks a structural shift in how Ethereum handles rollup data. Instead of requiring every node to download full blob data, PeerDAS assigns nodes the responsibility for only a fraction. Analysts expect this to reduce disk usage for standard nodes by roughly 80%, while also lowering bandwidth demands once throughput rises.

Because rollups will be able to post more data without overwhelming the base layer, developers anticipate smoother scaling and improved fee stability during congestion. The system's design targets an eightfold increase in available capacity, giving L2 networks more room to expand without pushing Ethereum's infrastructure to its limits.

Moreover, the upgrade introduces a mechanism that allows blob-capacity changes between major releases. Blob-parameter-only forks provide clients with a lighter process for adjusting data limits when demand accelerates, enabling Ethereum to react faster without coordinating another full hard fork.

Fusaka also introduces protective guardrails around block composition and key cryptographic functions. A 16.7-million gas cap per transaction prevents oversized calls from congesting block space or creating denial-of-service pressure. Updated pricing for the MODEXP precompile addresses long-standing concerns about underpriced operations slowing validation times.

User-Experience Features Gain Focus

Ethereum clients will gain deterministic proposer lookahead, providing applications and users with clarity on upcoming block proposers and enabling more reliable pre-confirmation flows. The new CLZ opcode will simplify certain arithmetic operations in smart contracts, offering incremental gas savings and streamlining computation-heavy logic.

Because the upgrade activates automatically for all users, no action is required across the ecosystem. Fusaka has already completed testing on Holesky and Sepolia, clearing the final steps before mainnet deployment.

Following activation, two incremental blob-capacity bumps are planned for December 9 and January 7. These adjustments will free up more bandwidth for rollup data posting and enable Ethereum to transition gradually to higher throughput levels