[aleisia]

Hi, I know that host_to_node is actually this way: host -> node-0 -> nodes, so node-0 can send data to nodes, but how about nodes-> node-0?
node_to_host just means that data can be passed from node-0 to host.

Is it possible to pass data from nodes to node-0 without using PRF_CSEND or PRF_CRECV?

In Official UDF manual 7.8 parallel udf example, Global Summation of Pressure on a Face Zone and its Area Average Computation, they just used host_to_node and node_to_host, and they seemed to mean that they can pass data between nodes and host, but I don't see how that's possible.

I'm really confused!

Please explain.

Thanks!