data/test/worker_0000_progress.json

{
  "worker_index": 0,
  "worker_count": 32,
  "target_records": 7,
  "written": 7,
  "attempts": 15,
  "records_per_sec": 1.8489217136835039,
  "attempts_per_sec": 3.9619751007503656,
  "updated_at": "2026-04-25T08:51:21.737473"
}