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Reliability Guide

Purpose

Provides practices to ensure stable system operation and easy recovery from failures.

  • Journal/Recovery: hierachain/error_mitigation/{journal.py, recovery_engine.py, rollback_manager.py}
  • Cross-level Sync: hierachain/cluster/{cross_level_sync.py, state_sync_manager.py} (if applicable)

Patterns

  • Durable Journal: write before applying changes.
  • Safe Rollback: state can return to a safe point.
  • Automatic Recovery: standard scenarios for connection loss/DB errors.
  • Idempotency + Retry with backoff: repeat actions without duplicating effects.

Implementation Recommendations

  • Apply journal for important state-changing operations.
  • Set reasonable thresholds and timeouts for retry; ensure idempotency keys.
  • Use metrics/alert to detect abnormal retry loops.