Junrui Li created FLINK-36072:
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Summary: Optimizing the Overhead of the Network Layer in Adaptive
Execution Scenarios
Key: FLINK-36072
URL: https://issues.apache.org/jira/browse/FLINK-36072
Project: Flink
Issue Type: Sub-task
Components: Runtime / Network
Reporter: Junrui Li
In adaptive execution scenarios, hash edges may transition to broadcast edges;
however, at that point, the upstream may have already produced data based on
hashes.
For example, in the adaptive broadcast join case, this results in each
downstream task needing to connect to all upstream tasks and create a partition
reader for each subpartition, leading to significant overhead (O(N²)). To
optimize the overhead of the network layer, we need to enable downstream tasks
to consume all subpartitions from a specific Task Manager using a single
channel and a single partition reader in such situations.
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