[FLINK-29351] Enable input buffer floating for blocking shuffle

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Resolved
• Component/s: Runtime / Network
• Labels: pull-request-available
• Assignee: Unassigned
• Reporter: Yingjie Cao
• Created: 20/Sep/22 10:58
• Updated: 17/Jan/23 06:30
• Resolved: 17/Jan/23 06:30

Description

At input gate, Flink needs exclusive buffers for each input channel. For large parallelism jobs, it is easy to cause "Insufficient number of network buffers" error. This ticket aims to make all input network buffers floating for blocking shuffle to reduce the possibility of "Insufficient number of network buffers" error. This change can also improve the default blocking shuffle performance because buffer floating can increase the buffer utilization.

Issue Links

• relates to: FLINK-30469 FLIP-266: Simplify network memory configurations for TaskManager
• links to: GitHub Pull Request #20984