Android : Staged Roll-Out?

Question

Google I/O released an option of staged roll-out for % of people, I was trying to upload an api to market but couldn't find the option for this staged roll-out, could some one help me how to achieve this.

Regards Sreeram

Answer 1

Go to "Upload a new APK", after uploading a file the bottom left of the dialog box has options like "Publish Now", "5%", etc.