Hi there.
I am running rasplex on my RPi B, with Pogoplug as Server. The Pogoplug is admittedly not very responsive (but has fortunately a very low power consumption, was cheap and thus serves my purposes). To counter the low Pogo performance I have several scripts on it…like partial library scan solutions (which don’t work out-of-the-box) to reduce scanning times. Now I suppose, having always a complete and up-to-date cache seems to be a very good thing.
Now to my question(s):
Is there a way to programmatically trigger the precaching function? And if yes, can this only be triggered for all media, or also for some libraries or even for a single file?
I can live with doing it once a day, during night or so. So a complete caching is OK for 
cheers,
Matthias