I've some question about index:
1. Why an index can failed?
2. If an index fails, what actions can I do (on order)?
3. If the index of user User1 fails, what User1 can't do? Only the ev search?
I could edit the doco and put EV8 in it ;) - Apart from the default of 8 Index Locations and setting Indexes into Backup Mode - indexing hasn't changed in EV8 - and the best practises are still the same.