Github user rnowling commented on the pull request:
https://github.com/apache/spark/pull/1248#issuecomment-47395798
The main function (runBreeze) of the KMeans is not compatibilty, however,
since KMeans optimizes multiple runs by striping iterations across the runs.
With MiniBatch, each run's iteration will use a different randomly-sampled
subset of points so the runs have to be done independently.
I can pull out other shared functions, though.
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