At first, I have honestly no idea, if this is even possible or how complex the realisation is, but today i had the idea for a notification for owners, when logbooks are nearly full.
This is how it works (or could work):
We know that the standard PET-Preform logbook has the space for maybe 100 logs.
PGC evaluates the logs for the statistics, so PGC knows how many logs were approximately made after the last replacement of the logbook.
When, for example, 90 Logs were made, PGC could send a mail to the owner "The logbook of your cache GC123456 is 90 % full".
So that PGC can correctly determine the number of logs possible, the owner has to give PGC the correct number. This might be done directly on PGC with a new menu, or via the Owner maintenance log by adding the number in the log, for example:"Logbook was replaced *100*" Like with *FTF*, PGC sees the *100* as "100 possible logs" and resets the counter for the cache to 0.
I hope this idea doesn't sound too stupid or so, but it could help improving the maintenance of caches.