storage

Append-Only Log

Immutable sequential writes — data is only ever appended, never modified or deleted.

entries0
head offset-
total bytes0B
📜 Log (append-only, immutable entries)
empty — append entries above

How It Works

  • New entries always written at the end
  • Existing entries never modified
  • Sequential writes → optimal disk I/O
  • Each entry has a unique monotonic offset

Use Cases

  • Kafka commit log
  • Event sourcing
  • Write-ahead logs (WAL)
  • Blockchain (immutable ledger)