[Dovecot] Difference between Indexing and Rescan in FTS

[Fred Kilbourn]

I've had squat running on dovecot 2.0 and have been updating all users
mailbox indexes nighty via cron with this command:

doveadm -v search -A text xyzzyx

 

I've just updated to 2.1 and I'm migrating to lucene indexes, but reading
the documentation I'm having a hard time understanding the semantic
differences between indexing and rescanning.

 

If I were to continue to run an all user all mailbox index every night,
would that be appropriate?

 

Would running this every night avoid the need to ever rescan?

 

Should I run rescan instead of index?

 

Should I run both rescan and index?  In which order?

 

Best Regards,

FredK