Maya mr FG job

Hello
Here is an example of the problem.
I need to render the FG for 500 frames each second frame in the map, then I use it for rendering animation.
So there are three options:
1) If I assign the job on one node, all is well. Map of FG obtained normal.
2) If I put job on the farm, I do not understand what was happening. File size does not correspond to the first case. I don’t know what happens if two nodes are simultaneously written to a file. There is a conflict record or not?
3) If I put job on the farm, a few packages on the node. In this case there are more questions.

But there is one main question. Can I use options 2 and 3 for this task? Or it can be used only option 1 to render the FG map? And what does happen when two nodes simultaneously trying to write to a file, or a second node begins to write and the first has not yet completed?

Thanks in advance. The render of FG map on one node taking a very long time, and it seems nonsense to stick together as many files as chunks for each frame in Maya.