Techniques are described herein for distributed data stream programming and processing. The techniques include sending a request indicating one or more regions of a program code to access a stream in a stream pool and to execute on a processing node in a processing nodes pool. The techniques also include accessing the stream defined in the one or more regions of the program code to service the request. Thereafter, the processing node is selected to use for execution of the one or more regions of the program code and the processing node executes one or more instances of the one or more regions of the program code.