[FLINK-5338] Make printing sinks non-parallel

• Type: Sub-task
• Status: Closed
• Priority: Minor
• Resolution: Won't Fix
• Component/s: API / DataStream
• Assignee: Unassigned
• Reporter: Stephan Ewen
• Created: 14/Dec/16 14:26
• Updated: 02/Oct/19 17:43
• Resolved: 19/Apr/17 18:25

Description

This is a suggestion, up for discussion.

I suggest to make the DataStream::print() sink function inherently non-parallel, i.e., always executed in a single parallel sink.

Since printing is only for toy setups anyways, and the performance is usually bound by the stdout stream, non-parallel prints should be sufficient.