The features and functionality available with the DirectConnect for z/OS Option are available to the three-tier user of the Server Option and unavailable in a two-tier environment. These features include the following:
DirectConnect for z/OS Option access service features
DirectConnect for z/OS Option TRS features
General DirectConnect for z/OS Option functionality
The following DirectConnect for z/OS Option access service features are available to the three-tier user:
Datatype translation - Datatypes used by your client applications are matched those used on the mainframe.
SQL transformation - The SQL used by your client applications matches the SQL used by mainframe applications.
The following DirectConnect for z/OS Option TRS features are available to the three-tier user:
IMS/MVS access - IMS/MVS data is available to the client in a three-tier environment.
Transaction mapping by security definition - Transactions can be mapped from client to mainframe by the security definition.
Transaction mapping by user ID - Transactions can be mapped from client to mainframe by the user ID of the client.
The following DirectConnect for z/OS Option features are available to the three-tier user:
Logging, tracing, and accounting – Your environment can use DirectConnect for z/OS Option facilities for logging, tracing, and accounting.
GUI configuration and multi-user management – Any GUI configuration and user-management tools available with the DirectConnect for z/OS Option are available to the three-tier user.
SNA connectivity – The SNA connectivity protocol can only be used through a gateway, which provides TCP/IP-to-SNA protocol conversion.
Access to multiple CICS regions – Client applications in a three-tier environment may access multiple CICS regions at one time.
Transaction grouping – Transactions may be grouped in a three-tier environment.
Security – Additional levels of security may be implemented by the gateway in a three-tier environment.
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