Client Option is a programming environment that provides Open Client™ Client-Library routines for use in building mainframe client applications.
The Client Option runs on an IBM z/Series or plug-compatible mainframe computer. It uses TCP/IP communications and is available for CICS, IMS TM and native MVS host transaction processors.
This guide will focus on the Client Option installation and administration for IBM IMS TM and MVS. For information relating to the Client Option for CICS, refer to the Mainframe Connect Client Option for CICS Installation and Administration Guide.
Client Option applications can communicate with two kinds of servers:
Adaptive Server Enterprise and Open Server™ on PCs and several mid-range UNIX platforms.
Server Option applications running in a separate region on the mainframe.
Client Option applications can send requests to Adaptive Server Enterprise, Open Server applications, and Server Option applications such as the DB2 UDB Option for CICS.
Client Option applications can send requests to Adaptive Server Enterprises indirectly in a two-tier (gateway-less) environment using TCP. See the following section for more information on the two-tier environment.
Client Option applications can send requests directly to Server Option applications.
Mainframe ClientConnect (MCC) is no longer being provided
or supported. Sybase recommends that you migrate from a three-tier
(gateway-enabled) environment to a two-tier environment using TCP.
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