By request, I'm resharing my slides and doc on how to write a beam IO
https://docs.google.com/document/d/1-WxZTNu9RrLhh5O7Dl5PbnKqz3e5gm1x3gDBBhszVF8/edit?usp=sharing https://docs.google.com/presentation/d/14PjBNFoCOFOROiQCdR3hkbg1fkDGSz-0Aer4L88P8Uk/edit?usp=sharing Please feel free to comment on any questions you have, or places you feel need more detail John
