G23 · Design Google Photos G23 · 设计 Google Photos
Verified source经核实出处
Google Photos architecture discussed in public talks. Credibility A.
Key decisions关键决策
- **Content hash dedup** (with per-user privacy boundary).**内容哈希去重**（按用户保隐私边界）。
- **Async ML**: upload fast-path; classification runs in background; results cached.**异步 ML**：上传快返；后台做识别；结果缓存。
- **Embeddings index for search**: ANN enables natural-language search.**嵌入索引用于搜索**：ANN 支持自然语言搜索。
- **Privacy**: user-scoped embeddings, face groups opt-in.**隐私**：按用户嵌入；人脸分组 opt-in。
Follow-ups追问
- Storage tiering? originals moved to cold when not accessed 90 d.分级存储？90 天未访问降到冷层。