Rails - Mar 2005 - [OT] Updating a production sqlite database

Hi,

I''ve decided to use sqlite3 to power my rails app.  But I''m
having
difficulities trying to figure out how I should perform upgrades on
the database once the site goes live.

A minute or two of downtime is no big deal and the database doesn''t
have inserts or updates all that often.  But what if inserts and
updates happened a lot, or uptime was crucial?  What are good
strategies to use for performing database upgrades?

Thanks,
Joe