What is the difference between a Sysplex and Parallel Sysplex?
A sysplex can be either basic or parallel. A basic sysplex can communicate using channel to channel (CTC) connections between LPARs. Parallel Sysplex uses something called a Coupling Facility (CF). Note: The Parallel Sysplex Coupling Facility can run either as a separate LPAR or within a dedicated hardware device.
What is Parallel Sysplex in mainframe?
Parallel Sysplex is a clustering technology which allows you to operate multiple copies of a z/OS as a single system image. Images can be added or removed to the cluster as needed, while applications continue to run.
What are the two types of Sysplex?
There are two types of sysplex: base and parallel.
- A base sysplex is a sysplex implementation without a coupling facility.
- A parallel sysplex is a sysplex implementation with a coupling facility.
What is a coupling facility related to Parallel Sysplex?
Cross system coupling facility (XCF) services allow authorized programs on one system to communicate with programs on the same system or on other systems. If a system fails, XCF services also provide the capability for batch jobs and started tasks to be restarted on another eligible system in the sysplex.
What is the purpose of a coupling facility?
A coupling facility enables software on different systems in the Parallel Sysplex® to share data with the assurance that the data will not be corrupted and will be consistent among all sharing users. To share data, systems must have connectivity to the coupling facility through coupling-facility links.
What does IBM GDP mean?
Geographically Dispersed Parallel Sysplex
Geographically Dispersed Parallel Sysplex (GDPS) is an extension of Parallel Sysplex of mainframes located, potentially, in different cities.
How many LPARs can be in a Sysplex?
eight logical partitions
In 1990, IBM mainframe computers introduced the concept of a Systems Complex, commonly called a Sysplex, with MVS/ESA SPV4.1. This allows authorized components in up to eight logical partitions (LPARs) to communicate and cooperate with each other using the XCF protocol.