[FLINK-9076] Make credit-based floating buffers optional

• Type: Sub-task
• Status: Closed
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 1.5.0, 1.6.0
• Fix Version/s: 1.5.0
• Component/s: Runtime / Network
• Assignee: Nico Kruber
• Reporter: Nico Kruber
• Created: 26/Mar/18 08:57
• Updated: 23/Apr/18 04:55
• Resolved: 23/Apr/18 04:55

Description

Currently, floating buffers (per gate) are always required in case credit-based flow control is enabled. This, however, increases our minimum number of required network buffers.

Instead, without changing too much, we could already work with a minimum of one or zero floating buffers and set the max to the configured value. This way, if there are not enough buffers, all {{LocalBufferPool}}s will at least share the available ones.

Issue Links

• links to: GitHub Pull Request #5874