I've found these two commands related to 'auto-save' on the Op wiki page:
/save-off- turns off auto-save.
/save-on- turns on auto-save.
but I can't find any documentation on the length of time between this 'auto-save'.
Is the duration between saves referenced anywhere?
I'm trying to automatically backup SMP saves and although I'm aware of some libraries where I can communicate with the server (mcchat for example) I'd rather use something that was built into the game as it reduces the chance of it breaking later.
Bonus points for diagrams.