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Sunnyside Devnet Reports (Internal)

Overview

• ~1700 node devnet (1/8th of Mainnet) sustained ~22/33 blobs and operated at ~48/72 blobs; uplink caps on fullnodes (50Mbps) were hit frequently.
• Network usage doubled between 22/33 → 48/72 blobs; supernodes’ column gossip was ~16x that of fullnodes, while EL P2P usage became a heavier burden on fullnodes.
• At scale, EL P2P spikes outweighed column gossip spikes, adding instability; upload spikes from column gossip were milder, possibly due to higher CL peer counts (100-200).
• GetBlobsV2 reliability fell with higher blob counts; Geth/Nethermind showed more availability than hit-rate (hinting at partial blobs), while Reth improved markedly.
• CPU/RAM usage rose ~10% compared to smaller devnets; some validators showed stress during syncing; many non-validators hit 90%+ RAM (on 8GB setup below EIP-7870 guidance).

Introduction

In Collaboration with EthPandaOps 🐼 💙

Nearly 1700 nodes were deployed to simulate ~1/8th of Mainnet this time, Sunnyside & Base providing almost 800 nodes. We believe running at such scale would give one of the closest approximation to blob scaling before Fusaka.

We aim to provide our analysis and perspectives on blob scaling: blob throughput, bottlenecks and HW requirements in addition to PandaOps’ in-depth analysis. PandaOps’ analysis gives strong basis of reasons why we can do early BPOs with high level of confidence, but they found attestation becoming less stable from 20 blobs or higher leaving doubts to scale more than 20 blobs in later BPOs.

As many have anticipated, we see meeting network requirements from EIP-7870 as one of the main bottlenecks alongside others, making difficult to attest in time. Meanwhile, EF P2P team has been suggesting that we could be able to achieve higher blob counts with more stability with few non-fork related changes.

Let’s explore into such bottlenecks and new findings from testing at scale compared to smaller devnets to help shaping further BPO schedule.

Devnet Information

Setup & Configurations

Below is the setup of Sunnyside Lab’s nodes. Please find https://notes.ethereum.org/@ethpandaops/fusaka-devnet-5 for overall spec.

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