The Red Book can give you many ideas [2].
Mark Callaghan has been published a lot of stuff related to LSM recently [3].
[1] http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.219...
[2] http://www.redbook.io/
[3] https://smalldatum.blogspot.com/?m=1
Real database systems are more sophisticated, but the most basic B+-Tree is still very interesting.
The Red Book can give you many ideas [2].
Mark Callaghan has been published a lot of stuff related to LSM recently [3].
[1] http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.219...
[2] http://www.redbook.io/
[3] https://smalldatum.blogspot.com/?m=1