Role of the client channel definition table

The client channel definition table (CCDT) contains definitions of client connection channels. It is particularly useful if your client applications might need to connect to a number of alternative queue managers.

The client channel definition table is created when you define a queue manager. The same file can be used by more than one IBM MQ client.

There are a number of ways for a client application to use a CCDT. The CCDT can be copied to the client computer. We can copy the CCDT to a location shared by more than one client. We can make the CCDT accessible to the client as a shared file, while it remains located on the server.

From IBM MQ Version 9.0, the CCDT can be hosted in a central location that is accessible through a URI, removing the need to individually update the CCDT for each deployed client.