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Logical coupling (or evolutionary coupling or change coupling) analysis exploits the release history of a software system to find change patterns among modules or classes: e.g., entities that are likely to be changed together or sequences of changes (a change in a class A is always followed by a change in a class B).
The high power consumption of ECL meant that it has been used mainly when high speed is a vital requirement. Older high-end mainframe computers, such as the Enterprise System/9000 members of IBM's ESA/390 computer family, used ECL, [26] as did the Cray-1; [27] and first-generation Amdahl mainframes. (Current IBM mainframes use CMOS. [28])
Loose coupling in broader distributed system design is achieved by the use of transactions, queues provided by message-oriented middleware, and interoperability standards. [ 2 ] Four types of autonomy, which promote loose coupling, are: reference autonomy , time autonomy , format autonomy , and platform autonomy .
In electronics, electric power and telecommunication, coupling is the transfer of electrical energy from one circuit to another, or between parts of a circuit. Coupling can be deliberate as part of the function of the circuit, or it may be undesirable, for instance due to coupling to stray fields .
Each generation became increasingly general-purpose by increasing memory capacity and loosening the coupling between processors. Only the original WW-Warp forced a truly lock step sequencing of stages, which severely restricted its programmability but was in a sense the purest “systolic-array” design.
In computer science, separation of concerns (sometimes abbreviated as SoC) is a design principle for separating a computer program into distinct sections. Each section addresses a separate concern, a set of information that affects the code of a computer program.
Functional Design is a paradigm used to simplify the design of hardware and software devices such as computer software and, increasingly, 3D models.A functional design assures that each modular part of a device has only one responsibility and performs that responsibility with the minimum of side effects on other parts.
A Parallel Sysplex [1] [2] [3] relies on one or more Coupling Facilities (CFs). A coupling facility is a mainframe processor (runs in an own LPAR, with dedicated physical CP, defined through Hardware Management Console (HMC)), with memory and special channels (CF Links), and a specialized operating system called Coupling Facility Control Code ...