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FORK cluster and functions depending solely on forking (e.g.,
mcparallel) are not supported by the GraalVM R runtime at the moment.
However, users can use the
PSOCK cluster, which should work in the same way on the GraalVM R runtime as on GNU R.
Moreover, R can be used as a worker node in a
PSOCK cluster computation driven from GNU R.
See FastRCluster package for GNU R, which provides helper functions to create
PSOCK cluster nodes that run the GraalVM R runtime.