2023
https://habr.com/ru/companies/otus/articles/770364/
https://habr.com/ru/companies/nixys/articles/765694/
    ! need to read
2012
https://stackoverflow.com/questions/9625246/what-are-the-underlying-data-structures-used-for-redis/9626334#9626334
    https://habr.com/ru/post/144054/