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                ### 主從復制 主要涉及三個線程:binlog 線程、I/O 線程和 SQL 線程。 * **binlog 線程**:負責將主服務器上的數據更改寫入二進制日志(Binary log)中。 * **I/O 線程**:負責從主服務器上讀取二進制日志,并寫入從服務器的中繼日志(Relay log)。 * **SQL 線程**:負責讀取中繼日志,解析出主服務器已經執行的數據更改并在從服務器中重放(Replay) ![](https://img.kancloud.cn/26/b9/26b93b2f4ee1145eeb569550fd1e01f7_704x345.png)
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