Can Fusaka boost Ethereum's scalability via PeerDAS?
2025-11-27 • Ian Irizarry
TL;DR
The Ethereum Fusaka upgrade, launching on December 3, 2025, introduces PeerDAS (Peer Data Availability Sampling) - a major leap in scaling that slashes bandwidth/storage strain by letting nodes sample data rather than download everything. Companies seeking funding should see big opportunity as rollups become dramatically cheaper, validator costs drop, and infrastructure becomes far more efficient.
Why PeerDAS is a real breakthrough for Ethereum scalability
Smarter blob handling, not just bigger blobs
Here’s the thing: since the Dencun upgrade, Layer-2 rollups on Ethereum hit a hard limit—9 blobs per block max. Fusaka mainnet announcement
PeerDAS, introduced with EIP-7594, flips this on its head. Nodes don’t grab entire blobs anymore; they only pull small, random samples. Thanks to erasure coding (think Reed-Solomon-like magic), if enough pieces exist, any node can reconstruct the full data. Pretty clever, right? PeerDAS – Ethereum roadmap
Blob Parameter Only forks – scaling step by step
The rollout is cautious. Fusaka introduces “Blob Parameter Only” (BPO) forks that nudge blob limits up slowly: from 6/9 blobs → 10/15 → 14/21. These are config tweaks, so no big changes to consensus or execution layers happen here. Fusaka mainnet announcement
Validators and infrastructure get a break
Because nodes only sample data, bandwidth and storage demands drop significantly. Validators verify data availability statistically without fetching everything. For startups or institutions running validators, this means they’ll spend less on hardware and upkeep. Just a heads-up: you’ll still need to keep an eye on client software updates to avoid hiccups. PeerDAS – Ethereum roadmap
What this means for Layer-2 projects, growth, and business models
Rollups get some much-needed breathing room
Rollups like Optimism, Arbitrum, Base constantly push blob capacity limits. With PeerDAS and BPO forks expanding capacity, gas fees for posting L2 transactions should fall—making these rollups more competitive. Ethereum Fusaka dec3 launch
Institutional adoption just got more realistic
Lower costs for nodes plus smoother vertical scaling mean institutions can finally take Ethereum validators seriously. Big dApps, DeFi, and tokenized assets all stand to benefit from more predictable fees and less infrastructure drag. Fusaka with PeerDAS is a clear signal Ethereum’s Layer 1 and 2 stack is maturing for serious players. Ethereum Fusaka upgrade—PeerDAS scaling potential and institutional adoption
Funding pitches get sharper and more convincing
If you’re building on Ethereum, you can now highlight PeerDAS advantages—lower transaction costs, scalable throughput, and better L2 usability. VCs love lower risk, and aligning with the Ethereum Foundation roadmap scores you serious credibility.
Key dates & rollout to help you prep
| Phase | Network | What happens |
|---|---|---|
| Oct 1, 2025 | Holesky testnet | Fusaka test kicks off with PeerDAS and baseline features Fusaka testnet announcement |
| Oct 14, 2025 | Sepolia testnet | More testing, including higher blob capacity simulations Fusaka testnet announcement |
| Oct 28, 2025 | Hoodi testnet | Final prep before mainnet—fine-tuning and stress checks Fusaka testnet announcement |
| Dec 3, 2025 at slot 13,164,544 (~21:49:11 UTC) | Mainnet launch | Fusaka goes live, PeerDAS included Fusaka mainnet announcement |
| Dec 9, 2025 | BPO1 fork | Blob limits jump from 6/9 to 10/15 Fusaka mainnet announcement |
| Jan 7, 2026 (approx.) | BPO2 fork | Another bump to 14/21 blobs per block Ethereum Fusaka dec3 launch |
Real-world examples & what questions funders will ask
- Example: Imagine a DeFi protocol posting on Base L2 during peak times. Currently, they face steep blob fees and latency. After Fusaka plus PeerDAS, they can post when blobs aren’t saturated or fit into the expanded capacity—dropping costs by 40-60% in some scenarios. Ethereum Fusaka upgrade—PeerDAS scaling potential and institutional adoption
- Example: A validator service scaling from 100 nodes. Thanks to PeerDAS, each node only needs to store part of the blob data. Network and storage costs shrink, lowering the break-even point for new investments.
You can bet investors will want to know:
- How much blob data do you plan to use now vs later?
- How’s your L2 contract design handling data availability latency?
- What about your validator setup—hardware specs, bandwidth, redundancy? Planning for supernodes that subscribe to multiple subnets?
Risks & things to keep on your radar
Technical complexity remains a challenge
PeerDAS is built on sampling, erasure coding, new gossip protocols, and column subnets. Bugs or network delays could mess with data availability guarantees. Testing on all testnets has to be thorough—don’t skip this. PeerDAS – Ethereum roadmap
Scaling steps might not keep up with demand
While BPO1 and BPO2 are planned, their timing depends on network health. If congestion flares up, these upgrades might slow, delaying expected benefits.
Infrastructure has to be ready
Operators, validators, and client teams need to update software (consensus and execution layers). Projects that rely on exact timing must verify client compatibility. The change from blob proofs to cell proofs requires careful handling to avoid disruptions. r/ethtrader discussion
How to position your company for funding
Highlight scalability and cost savings
Your pitch should clearly outline current transaction costs versus expected drops after Fusaka. Showcase how validator bandwidth and storage needs shrink, alongside lower L2 gas fees. Let funders see your path to sustainable scaling.
Focus on rollups and data availability as a service
If you’re building infrastructure, think about tools for data sampling, node auditing, or rollup optimizations. Projects that smooth integration will stand out.
Tie your narrative to Ethereum’s roadmap and grants
Ethereum Foundation grants favor projects aligned with major upgrades. Stress how your work supports Fusaka and PeerDAS to gain trust and credibility.
Start scaling operations well before December
If you want to launch or grow in early 2026, budget time and resources for node updates, testnet trials, and adapting to new proof formats (cell proofs). The timeline’s tight, but definitely do-able.
FAQs companies & investors are asking
What is PeerDAS exactly?
PeerDAS (Peer Data Availability Sampling, EIP-7594) lets nodes sample bits of blob data instead of downloading full blobs. Through erasure coding, missing parts can be rebuilt. This cuts bandwidth and storage needs while keeping data available. PeerDAS – Ethereum roadmap
How much more data capacity will Ethereum support?
Theoretically, it’s up to 8× more blob throughput versus downloading everything. Fusaka’s first BPO raises limits from 6/9 blobs → 10/15; the second BPO moves to 14/21. PeerDAS capacity (8x)
When does this all go live?
Mainnet activation is December 3, 2025 at slot 13,164,544 (~21:49 UTC). Then BPO1 hits around December 9, and BPO2 about January 7, 2026. Fusaka mainnet announcement
Does this change security or decentralization?
Ethereum’s goal is to keep decentralization intact. PeerDAS uses sampling plus cryptographic proofs to maintain security. Supernodes or custodial nodes handle more data, while regular nodes deal with less. PeerDAS – Ethereum roadmap
What do developers and rollups need to update?
- Switch to the new cell proof format from blob proofs. r/ethtrader discussion
- Prepare client software for Fusaka and the BPO forks.
- Adjust L2 rollup specs and gas estimation for bigger blob capacity.
- Keep an eye on latency or data gaps—test extensively on Holesky, Sepolia, and Hoodi testnets.
Ethereum Fusaka with PeerDAS isn’t just another upgrade. I’ve found it to be a strategic leap in infrastructure. For companies chasing funding, it means lower costs, bigger scalability, and a clearer runway to mass adoption. If you’re building rollups, validator services, enterprise dApps, or tooling, this is the moment to lean in, reshape your plans, and stand out in your pitch.