reswqa opened a new pull request, #21856:
URL: https://github.com/apache/flink/pull/21856
## What is the purpose of the change
*Partition reuse only take effect for re-consumable edge, but hybrid
selective result partition is not re-consumable. This optimization is very
important to reduce the cost of the shuffle write phase. In the previous
implementation, we will only force the broadcast edge to be of hybrid
full(re-consumable) in the 'ResultPartitionTypeFactory'. As a result, for `ALL_
EXCHANGE_HYBRID_SELECTIVE` job, partition reuse cannot take effect for
non-broadcast edges.
In fact, we expected to replace all the edges that can be reused with hybrid
full result partition.*
## Brief change log
- *Change broadcast hybrid selective result partition type to hybrid full
in compile phase instead of partition create phase.*
- *Change reusable hybrid result partition to hybrid full to enable
partition reuse optimization.*
## Verifying this change
This change added tests in `StreamingJobGraphGeneratorTest`.
## Does this pull request potentially affect one of the following parts:
- Dependencies (does it add or upgrade a dependency): no
- The public API, i.e., is any changed class annotated with
`@Public(Evolving)`: no
- The serializers: no
- The runtime per-record code paths (performance sensitive): no
- Anything that affects deployment or recovery: JobManager (and its
components), Checkpointing, Kubernetes/Yarn, ZooKeeper: no
- The S3 file system connector: no
## Documentation
- Does this pull request introduce a new feature? no
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