[Samba] Winbindd & Domain Controllers

[David Norman]

How intensely does Samba (winbindd) interact with a DC after the initial 
login ?
I'm looking at a situation where the DC is in a different area to the 
samba system, and is liable to lose power during maintenance. No other 
DCs will be available. The Windows apps that use samba need to keep on 
running. Is an unavailable DC an issue ? Can I use the winbindd caching 
options to help ?

Thanks,