And so it turns out that if you turn off autoflush, Amanda will never flush existing dumps to tape regardless of the flush-threshold-* settings. Which I guess makes sense. And with "autoflush yes", it seems to simply flush everything currently on the holding disk regardless of other settings. So as far as I can tell, the flush-threshold-* settings are simply not working as designed.
What can I tweak to get more insight into how Amanda decides when to flush existing dumps? I will continue to play with the thresholds to see if I can get behavior closer to I'm looking for but it would be good to have some insight into the decision process. - J<
