Github user sethah commented on the issue:
https://github.com/apache/spark/pull/15148
@karlhigley Thanks for your detailed response. From the amplification
section on
[Wikipedia](https://en.wikipedia.org/wiki/Locality-sensitive_hashing#Amplification),
it is pretty clear to me that this implementation is not doing OR/AND
amplification. `outputDim` is just the number of concatenated random hash
functions (`k` in the wiki article).
For now we can clarify some of this a bit better in the documentation, and
perhaps in the future we can extend this implementation to use optional AND/OR
amplification. I can work on a PR for it this week, unless there are any
objections. @jkbradley @Yunni @MLnick ?
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