[jira] [Created] (FLINK-3783) Support weighted random sampling with reservoir

[Shang Yuanchun (Jira)]

GaoLun created FLINK-3783:
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             Summary: Support weighted random sampling with reservoir
                 Key: FLINK-3783
                 URL: https://issues.apache.org/jira/browse/FLINK-3783
             Project: Flink
          Issue Type: Improvement
          Components: Core
            Reporter: GaoLun
            Assignee: GaoLun
            Priority: Minor


In default random sampling, all items have the same probability to be selected. But in weighted random sampling, the probability of each item to be selected is determined by its weight with respect to the weights of the other items.



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