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every.channel/evolution/proposals/ECP-0104-ecp-forge-dual-ethereum-full-nodes-on-dedicated-nvme-zfs.md
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Advance forge NBC worker and Ethereum full nodes
2026-04-03 02:01:34 -07:00

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ECP-0104: ecp-forge dual Ethereum full nodes on dedicated NVMe ZFS

Why

every.channel now has OP Stack and Ethereum contract rails on ecp-forge, but it still depends on public L1 RPC and beacon providers for Ethereum itself.

The forge host has enough raw capacity in tank, but tank is a large HDD raidz3 pool that is well suited for archive bytes, not for the random-read/write pattern of concurrent Ethereum execution and consensus sync. The same host also has a free 7 TB NVMe device, which is the right media class for a self-hosted node.

Decision

  1. Create a dedicated single-device ZFS pool for Ethereum on the free NVMe in ecp-forge.
  2. Run two full-sync Ethereum node pairs on that pool:
    • Ethereum mainnet
    • Ethereum Sepolia
  3. Use Reth for execution and Lighthouse for consensus.
  4. Keep raw execution and beacon RPC local-only on ecp-forge for the first tranche.
  5. Publish sync and finality status on https://eth.every.channel.
  6. Because this tranche is explicitly full-sync from genesis, run Lighthouse with --allow-insecure-genesis-sync instead of checkpoint bootstrap.

Consequences

  • every.channel gets repo-owned L1 execution and consensus rails for both mainnet and Sepolia.
  • Ethereum state no longer competes with tank archive I/O.
  • The first public surface is intentionally conservative: health and sync visibility, not unauthenticated public JSON-RPC.
  • The dedicated Ethereum pool is single-device NVMe, so it optimizes for node performance rather than storage redundancy.
  • Consensus sync starts from genesis without checkpoint assistance, which is slower but matches the requested full-sync posture.

Rejected Alternatives

  • Put Ethereum state on tank: rejected because the HDD raidz3 pool is the wrong latency profile for concurrent execution and consensus sync.
  • Keep using only public upstream Ethereum providers: rejected because the OP Stack and settlement rails should not depend on third-party RPC availability.
  • Expose raw JSON-RPC on eth.every.channel immediately: rejected for the first tranche because it creates an unauthenticated public abuse surface before auth and rate policy exists.
  • Use checkpoint sync for Lighthouse: rejected for this tranche because the requested posture is full sync from genesis on both networks.