It is a load balancer Google is using in production: http://techcrunch.com/2016/01/29/google-open-sources-its-see...
Edit: Here's the official Google announcement: http://google-opensource.blogspot.com/2016/01/seesaw-scalabl...
Edit: Here's the official Google announcement: http://google-opensource.blogspot.com/2016/01/seesaw-scalabl...
EDIT: If you're going to down-vote this comment, at least provide detaro with the correct answer to his/her question!