Originally Posted by
susieling
If I make two reservations at roughly same time, will the partner airline's award inventory got updated right away so my second book will fail?
In general, yes. Also note that some partner bookings need to be confirmed by the partner (I don't know if CA is one of those), so it may not ticket right away anyway. However, since you can cancel any booking with no penalty within 24 hours, it can't hurt to try.