How exactly should a database be implemented?

How-databases-work

http://coding-geek.com/how-databases-work/

The data structure and algorithm principle behind MySQL index

Http://blog.codinglabs.org/articles/theory-of-mysql-index.html

MySQL index with index Condition pushdown

Http://blog.codinglabs.org/articles/index-condition-pushdown.html

Wu Dysprosium's blog

http://www.cnblogs.com/foxmailed/

Analysis on the principle of concurrent write Btree

Http://www.cnblogs.com/foxmailed/p/2914625.html

Btree Concurrent Memory Reclamation

Http://www.cnblogs.com/foxmailed/p/3505773.html

The principle of relational database

http://www.cnblogs.com/foxmailed/p/5463922.html#3426647

Dengfa into a blog

http://hedengcheng.com/

Question and Answer: how do college students implement a database?

https://www.zhihu.com/question/35382593

Question and answer: how do you implement a relational database on your own?

https://www.zhihu.com/question/38870156

MySQL Series: InnoDB Source Analysis page Structure parsing

http://blog.csdn.net/duxingxia356/article/details/42674451

How exactly should a database be implemented?