{"id":"fdatasync-not-available-on-darwin","text":"Python's `os.fdatasync` exists only on Linux, not macOS/Darwin; any switch from `os.fsync` requires a platform fallback via `getattr(os, 'fdatasync', os.fsync)` to work on the current development environment","truth_value":"IN","source":"entries/2026/05/29/topic-fdatasync-vs-fsync-optimization.md","source_url":"","source_hash":"","justifications":[],"dependents":[],"metadata":{},"explanation":{"steps":[{"node":"fdatasync-not-available-on-darwin","truth_value":"IN","reason":"premise"}]}}