By default, message map files are deployed in BAR files as a part of an application, integration service, or library that provides an integration solution. You can also deploy a map as an independent resource if you are managing your message flows that way. If you change a message map, you must redeploy your integration solution, or independent message flows.
IBM® Integration Bus prepares message maps for execution on deployment instead of when the first message is flowed through the Mapping node.
When you deploy message maps, the behavior of IBM Integration Bus is as follows: