Github user chiwanpark commented on the pull request:
https://github.com/apache/flink/pull/696#issuecomment-119163944
@thvasilo Yeah exact k-NN is not scalable for gigabytes-sized,
terabytes-sized data. If I add R-Tree to this algorithm, the algorithm would be
better. But I agree that we need voting or discussion about this.
I am also interested in approximate k-NN but we should check progress to
the assigned contributor. :)
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