ARC Function Call Executor process

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• userInteraction_postRIB.c

    Upon the receipt of the AFC request, the coordinator starts the respective AFC executor process. This process is itself a RPC server and it is a separate process with its own memory space. The AFC executor provides RPC interfaces to :

• receive the arugments needed to perform computation.
• get the result of the posted AFC.
• terminate itself.

The executor process performs computation on receiving the arguments and when the computation finishes, it makes a RPC call on the local coordinator to intimate it about the completion of the computation. The AFC executor is reused if the same task is executed on possibly different data. The reuse of AFC executor eliminates the cost of starting remote AFC for the same task  with different data.
When the executor process has finished the execution and it is no longer needed, it can be terminated by invoking the RPC call on it.