data/test/worker_0000_progress.json

{
  "worker_index": 0,
  "worker_count": 32,
  "target_records": 7,
  "written": 7,
  "attempts": 12,
  "records_per_sec": 2.0619373502450786,
  "attempts_per_sec": 3.5347497432772776,
  "updated_at": "2026-04-29T03:16:15.832972"
}