https://habr.com/ru/articles/111874/ -- TRIE explanation and some ideas where to use it

https://www.youtube.com/watch?v=_doRiQS4GS8 -- a baseline to understand how concepts and metaprogramming works. Found it easy to understand but need more materials to actually understand.

https://www.cs.umb.edu/~poneil/lsmtree.pdf -- during my internship at YTSaurus and now in SaaS finally decided to read something about LSM trees. A little bit more then on wiki.

https://en.wikipedia.org/wiki/Bloom_filter -- need to know probabilistic data structure to fast determination if elements exists or no