Real World scenario?

in CCNA & CCENT
what would happen if there was a new lsa and ospf topology changed during a massive data transfer. would the data be interrupted? since lsa happen every 30 mins, how would the convergence effect normal data stream. would the path change? it would have to if a router went down?
Comments
Does this mean that the entire FIB and adjacency table doesn't need to be cleared when an SPF recalculation takes place, and that only entries pertaining to the update are affected?
Yes, the forwarding table is only updated if need be.
In the case of the 30 minute LSA refresh timer of OSPF, it will not cause any packet loss as the route to the destination will never be removed from the data-plane and the destination will still be reachable.
*Edit: I did not include the time to update the routing table from the forwarding table since this is done at the same time.