> For the complete documentation index, see [llms.txt](https://docs.postgresql.tw/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.postgresql.tw/11/server-administration/25.-bei-fen-ji-huan-yuan.md).

# 25. 備份及還原

與有價值的所有資料一樣，PostgreSQL 資料庫應定期備份。雖然程序本質上很簡單，但對基本技術和假設有清晰的了解是很重要的。

以三種根本上不同的方法來備份 PostgreSQL 資料：

* SQL dump
* 檔案系統層級的備份
* 持續性歸檔

每個方式都有它的優點和缺點；以下各節將逐一討論。


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