🔄Update: MySQL

2025-09-26 14:55:31 +08:00
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+# 日志
+
+- `undo log`
+  - 事务回滚
+  - MVCC
+- `redo log`
+  - 持久性保证（掉电恢复）
+- `binlog`
+  - 数据备份
+  - 主从复制
+
+![redo log](https://cdn.xiaolincoding.com/gh/xiaolincoder/mysql/how_update/wal.png?image_process=watermark,text_5YWs5LyX5Y-377ya5bCP5p6XY29kaW5n,type_ZnpsdHpoaw,x_10,y_10,g_se,size_20,color_0000CD,t_70,fill_0)
+
+**两阶段提交**
+- redo log
+- binlog
+
+![两阶段提交](https://cdn.xiaolincoding.com/gh/xiaolincoder/mysql/how_update/%E4%B8%A4%E9%98%B6%E6%AE%B5%E6%8F%90%E4%BA%A4.drawio.png?image_process=watermark,text_5YWs5LyX5Y-377ya5bCP5p6XY29kaW5n,type_ZnpsdHpoaw,x_10,y_10,g_se,size_20,color_0000CD,t_70,fill_0)