mysql 数据库备份和恢复

SunAlsoRise97 · Oct 8, 2022 · d815d85 · d815d85
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diff --git a/note/MySQL/InnoDB数据存储引擎.md b/note/MySQL/InnoDB数据存储引擎.md
@@ -14,13 +14,16 @@ InnoDB将数据划分为若干个页，InnoDB中页的大小默认为`16KB`。
 
 > 记录是按照行来存储的，但是数据库的读取并不以行为单位，否则一次读取（也就是一次I/O操作）只能处理一行数据，效率会非常低。
 
+![页](../../img/mysql/mysql存储引擎/5.页.png)
+
+
 ##### 1.2 页结构概述
 
 页a、页b、页c...页n这些页可以`不在物理结构上相连`，只要通过`双向链表`相关联即可。每个数据页中的记录会按照主键值从小到大的顺序组成一个`单向链表`，每个数据页都会为存储在它里边的记录生成一个`页目录`，在通过主键查找某条记录的时候可以在页目录中`使用二分法`快速定位到对应的槽，然后再遍历该槽对应的分组中的记录即可快速找到指定的记录。
 
 ##### 1.3 页的上层结构
 
-![image-20220330183814954](https://cdn.jsdelivr.net/gh/aoshihuankong/cloudimg@master/img/202203301838071.png)
+![页的上层结构](../../img/mysql/mysql存储引擎/页的上层结构.png)
 
 区（Extent）是比页大一级的存储结构，在InnoDB存储引擎中，一个区会分配`64个连续的页`。因为InnoDB中的页大小默认是16KB，所以一个区的大小是64*16KB=`1MB`。