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But when the request is a Copy Data that involves two hosts, it is more difficult
to figure out which DataHub/2 user profile entry will be sent along with the
request. Figure 174 on page 247 will help you understand which host will get
the DataHub/2 request and, by the same logic, which DataHub/2 user profile
entry will be sent with the request. The complexity is caused by the fact that the
OS/2 Database Manager can only be a requester in a DRDA network. When a
Copy Data function is requested that involves one OS/2 Database Manager
database and one DRDA server RDBMS, the request will always be sent to the
DataHub Support/2 component, which will process the request.
Because the security information sent with the Copy Data request is used for
both conversation security validation on the target host and the Copy Data
function itself, in order to succeed, the Copy Data function requires that the
security information be the same on both the source and the target RDBMS.
Figure 174. DH/2: User Profile Entry Selection Diagram
Chapter 7. Security Considerations 247