Duplicates Erigon datadirs using APFS copy-on-write clones or full filesystem copies.
npx skills add https://github.com/erigontech/erigon --skill erigon-datadir
Please help me install this Agent Skill. Skill: erigon-datadir Source: https://github.com/erigontech/erigon/tree/main/.claude/skills/erigon-datadir Command: npx skills add https://github.com/erigontech/erigon --skill erigon-datadir
Duplicating an Erigon node datadir is risky and slow: datadirs can be hundreds of gigabytes, copies can fail due to insufficient disk space, and naive copying wastes storage when the filesystem supports copy-on-write. This Skill provides a safe, validated procedure for cloning Erigon datadirs.
cp -ac for near-instant clones that consume no extra disk space, then removes chaindata from the clone.Duplicate my Erigon datadir from /data/erigon to /backup/erigon-copy using the appropriate copy method for my filesystem.
High-intent search queries and answers about installing and using this skill.
Verify the source contains nodekey, snapshots/, and chaindata/, confirm the destination does not exist, then copy with cp -a. On APFS volumes, cp -ac creates an instant copy-on-write clone; otherwise check free disk space against the source size first.
Use cp -ac on APFS to create a copy-on-write clone that shares storage blocks with the source and completes near-instantly. No disk space check is needed since the clone consumes no additional space until files diverge.
A valid Erigon datadir contains a nodekey file, a snapshots/ directory, and a chaindata/ directory. All three must exist before the directory should be treated as a duplicable Erigon datadir.
Copies typically fail because available disk space is smaller than the source datadir, which can be hundreds of gigabytes. Run df -h on the destination parent and du -sh on the source, and abort if free space is insufficient.
Yes, chaindata can be removed from a clone since Erigon3 stores most data in immutable snapshot files and chaindata stays small. The APFS procedure deletes chaindata from the destination after cloning.
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