Github user mridulm commented on the pull request:
https://github.com/apache/spark/pull/506#issuecomment-41206844
Agree, I was not suggesting that this specific change per-se makes it into
core.
Just that there are a lot of applications for all-reduce support in spark :
and if it were available out of the box, it will make porting a lot of algos
quite trivial !
And in that context, all reduce support should go into core.
If we feel that this specific PR is not what we want due to
limitations/design choices, that is fine by me.
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