Github user greghogan commented on the pull request:
https://github.com/apache/flink/pull/1956#issuecomment-217142445
1) Yes, that sounds right. The update function can choose which of Hub or
Authority to set.
2) Does `GSAConfiguration.setDirection` work the same as in scatter-gather?
4) The algorithm will be faster if you first set the edge values to
`NullValue`.
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