Ah, I see. No it does not matter, since the FDs are private to nodes, and have their own sliding window. Of course the logs will be dumped together untagged, but the intervals are correctly calculated independently of that. Also, every FD logs the interval 1, 3, 7, 15 steps ago, for correlation analysis, and since that data comes from the private sliding windows, they are correct. It does not matter if they are dumped together at the end, what matters is that they are correctly generated from per-node data.