Which ETH upgrade increased blob capacity?

TLDR

Ethereums Fusaka upgrade increased blob capacity by introducing PeerDAS and scheduled parameter-only blob increases, expanding data availability for Layer 2s and lowering their costs per an Ethereum foundation post.

1. PeerDAS enables up to 8x more blobs by letting nodes sample data instead of downloading full blobs, improving rollup throughput and fees Ethereum post.
2. Blob counts rise via BPO forks (from target 6/max 9 to 10/15 on 9 Dec, then 14/21 on 7 Jan 2026), increasing L2 publishing capacity Ethereum post.

Deep Dive

1. PeerDAS

PeerDAS (data-availability sampling) increases effective blob capacity by letting validators verify small samples rather than full blobs. This makes DA cheaper and more scalable for rollups, improving throughput and reducing L2 fees. Coverage highlights up to 8x data throughput for blobs, with decentralization preserved by lighter node requirements as adoption rolls out across clients and L2s Cointelegraph report.

• Media analyses emphasize PeerDAS as the headliner driving more blobs and cheaper rollup data posting Blockworks update.
• The upgrade complements a higher L1 gas limit to accommodate more transactions alongside blob processing CryptoSlate explainer.

2. BPO Blob Increases

Fusaka formalizes Blob Parameter Only (BPO) forks that raise blob targets incrementally without full hard forks (target 6/max 9 ? 10/15 on 9 Dec ? 14/21 on 7 Jan 2026), increasing L2 capacity safely over time CryptoSlate explainer.

• Ecosystem briefings detail the near-term schedule of blob target increases following Fusaka, with rollups gaining more room to grow as increases roll out Coingape summary.

Conclusion

Answer: Fusaka (ETHs latest major upgrade) increased blob capacity via PeerDAS and scheduled BPO raises. The change expands data availability for rollups, which should lower Layer 2 fees and improve throughput as the ecosystem adopts these features and blob counts climb.