I am working with a RowMatrix and I noticed in the multiply() method that the
local matrix with which it is being multiplied is being distributed to all of
the rows of the RowMatrix. If this is the case, then is it impossible to
multiply a row matrix within a map operation? Because this would
Yes, you can only use RowMatrix.multiply() within the driver. We are
working on distributed block matrices and linear algebra operations on
top of it, which would fit your use cases well. It may take several
PRs to finish. You can find the first one here:
https://github.com/apache/spark/pull/3200
