Hi @StephanEwen , your suggestion lead me to deep thinks, and the extreme
performance is exactly what we want. I am going to ask you for more
suggestions. I prefer to initialize the partitioner instance with a random
partition, however in the design ahead, the partitioner doesn't know the target
range.
The alternative is like this:
```
private final int[] returnArray = new int[] {new
Random().nextInt(Integer.MAX_VALUE - 1)};
@Override
public int[] selectChannels(SerializationDelegate<StreamRecord<T>> record,
int numberOfOutputChannels) {
this.returnArray[0] = (this.returnArray[0] + 1) %
numberOfOutputChannels;
return this.returnArray;
}
```
Please tell me how you think, thanks.
[ Full content available at: https://github.com/apache/flink/pull/6544 ]
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