To globally coordinate message flow transactions with updates in DB2 databases, configure the broker environment. This topic describes how to configure the broker environment when the broker uses a 64-bit queue manager.
All WebSphere MQ Version 6 queue managers on 64-bit platforms are 64-bit. 64-bit queue managers can coordinate transactions only in 64-bit mode. If the broker uses a 64-bit queue manager, you can globally coordinate message flows that are deployed to either 64-bit or 32-bit execution groups, but if you are using 32-bit execution groups you must define the data source name of the user database in both odbc.ini and odbc64.ini. If the broker uses a 64-bit queue manager or has a 64-bit execution group, the databases to which the broker connects must be 64-bit too.
To configure your broker environment for global coordination using a 64-bit queue manager as the transaction manager: