Coupling Facility


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Coupling Facility

The hardware and software that turns an IBM mainframe Base Sysplex system into a Parallel Sysplex. It is made up of special microcode built into the machine, and the CFCC operating system (Coupling Facility Control Code). It can be implemented as a stand-alone machine, in an LPAR logical partition or in a spare processor that becomes an Internal Coupling Facility (ICF).

The Coupling Facility allows up to 32 coupled systems to communicate using three coupling structures: "list" for simple data, "cache" for data buffering and "lock" for control of access to ensure data integrity. See Parallel Sysplex.
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The tubular coupling facility is an integral part of the company's plan to develop and manufacture oil country tubular goods (OCTG) products with premium connections.
This notice relates to the addendum, which Copenhagen Municipality intends to enter into with Nordhavnsvej Consortium I / S, with a view to the latter~s performance of coupling facility in conjunction with the existing contract between the parties.
The Coupling Facility acts like a distributed lock manager that manages the access to blocks of data held in systems' local caches.
Users now can access the tools necessary to prevent global locking conflicts, group buffer pool inefficiencies, coupling facility structure shortages and problematic threads -- all potential conditions that can negatively impact performance when accessing shared DB2 databases.
Connections can be between multiple LPARs on a single system or between one or more closely spaced systems and a coupling facility on another closely spaced system.
3 together with MainView for OS/390 provides Single System Image and Single Point of Control for all OS/390 images and extended online reporting for the Workload Manager and Coupling Facility.
There are two other suffix letters: R indicates reduced engine speed, and X indicates a coupling facility model that accommodates all engine speeds.
Parallel Sysplex Pilot is fully Parallel Sysplex capable, including Integrated Coupling Facility, and offers ultra high-speed ISB coupling, allowing communication with a Parallel Sysplex coupling facility at data rates more than three times that of current technology coupling links.
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Dynamic Coupling Facility Dispatching (Pilot PS and P7 models)
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