Per the blog post, it's both the client code and server code. The server code is >75% of the annotated Python. Which makes sense, given the amount of stuff you

Per the blog post, it's both the client code and server code. The server code is >75% of the annotated Python. Which makes sense, given the amount of stuff you have to do to run one of the world's larger distributed file system with tight SLAs (and auth, and your own data centers, etc).