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:
DirectConnect for z/OS Option access service features
DirectConnect for z/OS Option TRS features
General DirectConnect for z/OS Option functionality
These 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 to those used on the mainframe.
SQL transformation – the SQL used by your client applications matches the SQL used by mainframe applications.
These 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.
These 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 can be grouped in a three-tier environment.
Security – additional levels of security can be implemented by the gateway in a three-tier environment.
