need help about bgd and ospf

Hi all Can I have questions about bgp and ospf 1/ Do I have to redistrt bgd in ospf to make ospf to know which upstrem bgp routers to go out 2/ If yes, how many routes can ospf database handle as one full bgp table is about 400,000 routes 3/ When we have 8 ospf routers to run "redistrubt bgp", ls it 8 x 400,000 routes in ospf database? 4/ If not redistribted bgp, how ospf to know which upstream to go out Thank you for your help