There was some discussion on the very same for an Ask HN[0]. Copying my comment from there I've found the google/leveldb[1] source code to be immensely educatio

There was some discussion on the very same for an Ask HN[0]. Copying my comment from there I've found the google/leveldb[1] source code to be immensely educational, authored by Jeff Dean and Sanjay Ghemawat. The implementation of leveldb is similar in spirit to the representation of a single Bigtable tablet[2]. [0]: https://news.ycombinator.com/item?id=13854431 https://news.ycombinator.com/item?id=13854431 [1]: https://github.com/google/leveldb https://github.com/google/leveldb [2]: http://research.google.com/archive/bigtable.html http://research.google.com/archive/bigtable.html, section 5.3