Tech – Mainframe

XCF provides the services that allow multisystem application functions (programs) on one z/OS system to communicate with functions on the same or other z/OS systems. The communication services are provided through authorized assembler macros and are as follows: Group services Signalling services Status monitoring services       Group Services […]

Server Time Protocol (STP) is a server-wide facility that provides capability for multiple z/OS systems to maintain TOD synchronization with each other and form a Coordinated Timing Network (CTN), that is, a collection of z/OS systems that are time synchronized to a time value.   The External Time Reference (ETR) […]

A Base Sysplex configuration is a sysplex with no Coupling Facilities. The Base Sysplex can be composed of one or more z/OS systems that have an XCF sysplex name and in which the authorized programs (members) use XCF services. XCF services are available in both single and multisystem environments. A […]

To enable the communication between a Coupling Facility (CF) Logical Partition and the z/OS LPARs, special types of high-speed CF links are required. These links are important because of the impact of link performance on CF request response times. For configurations covering large distances, time spent on the link can be […]

The Coupling Facility LP is defined through HCD and Processor Resource/Systems Manager (PR/SM) panels on the Hardware Management Console (HMC). Once you have defined an LP to be a coupling facility LP, only the CFCC can run in that LP. When you activate the Coupling Facility LP, the system automatically loads the […]