Reduce-Scatter

void Intracomm.Reduce_scatter(Object sendbuf, int sendoffset,
                              Object recvbuf, int recvoffset,
                              int [] recvcounts,
                              Datatype datatype, Op op)

sendbuf	send buffer array
sendoffset	initial offset in send buffer
recvbuf	receive buffer array
recvoffset	initial offset in receive buffer
recvcounts	numbers of result elements distributed to each process
datatype	data type of each item in send buffer
op	reduce operation

Combine elements in input buffer of each process using the reduce operation, and scatter the combined values over the output buffers of the processes. Java binding of the MPI operation MPI_REDUCE_SCATTER.