RTCS system registry

The RTCS system registry can be seen as read/write auxiliary storage for the RTCS subsystem and all products that use the registry. Data in the RTCS system registry is accessed as if it were in virtual storage, but it is actually stored on DASD in a VSAM LDS. The RTCS system registry is managed and accessed much like an z/OS page data set, except that it is organized in a tree-like structure, similar to the Microsoft Windows registry. This structure speeds up the process of locating data in the registry because complex, self-defining structures can be stored as easily as a single byte or a string of characters.

The RTCS system registry can optionally be shared with additional RTCS subsystems on other z/OS images in the same sysplex. In the shared mode, one of the RTCS address spaces becomes the local registry owner and manages all access to the RTCS system registry. The other RTCS address spaces become remote registry accessors and make requests to put data into the registry and to retrieve data from the registry to the local owner through an XCF communications pipeline.

For more information about the RTCS system registry, see Understanding-the-RTCS-system-registry.