How to read from sql server and populate db2 tables real time

Hi,
My application is cobol running on the mainframe. Our previous interface application was cobol and vsam, but is now migrated to sql server and dotnet. Our main application has a jsp front end and cobol back end. We would like to convert our main application from the cobol back end programs reading vsam files and updating db2 (and vice versa) to reading sql server and updating db2 and vice versa.

I was wondering if someone has recommendations on the best (or perhaps possible) ways of doing this. One option would be to call a java scriptlet within the jsp that goes against the sql server, but that gets into the presentation layer and away from best practises. Is it even possible for the cobol to read sql server? Sorry if these are newbie questions buuuut I wouldn't ask if I knew, right

thanks much.

Can't you just place everything in DB2 or SQLServer, you'd get rid of 99% of your troubles

Very true, but unfortunately not an option. Our application is written for cobol/db2. One of the interface applications we access is moving to dot net/sql server and is written by another development team.