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Semaphore (programming) In computer science, a semaphore is a variable or abstract data type used to control access to a common resource by multiple threads and avoid critical section problems in a concurrent system such as a multitasking operating system. Semaphores are a type of synchronization primitive.
e. The spiral model is a risk-driven software development process model. Based on the unique risk patterns of a given project, the spiral model guides a team to adopt elements of one or more process models, such as incremental, waterfall, or evolutionary prototyping .
Software development. In software engineering, a software development process or software development life cycle is a process of planning and managing software development. It typically involves dividing software development work into smaller, parallel, or sequential steps or sub-processes to improve design and/or product management.
Multitier architecture. In software engineering, multitier architecture (often referred to as n-tier architecture) is a client–server architecture in which presentation, application processing and data management functions are physically separated. The most widespread use of multitier architecture is the three-tier architecture .
Anti-pattern. An anti-pattern in software engineering, project management, and business processes is a common response to a recurring problem that is usually ineffective and risks being highly counterproductive. [ 1][ 2] The term, coined in 1995 by computer programmer Andrew Koenig, was inspired by the book Design Patterns (which highlights a ...
Load balancing (computing) Diagram illustrating user requests to an Elasticsearch cluster being distributed by a load balancer. (Example for Wikipedia .) In computing, load balancing is the process of distributing a set of tasks over a set of resources (computing units), with the aim of making their overall processing more efficient.
In software deployment, an environment or tier is a computer system or set of systems in which a computer program or software component is deployed and executed. In simple cases, such as developing and immediately executing a program on the same machine, there may be a single environment, but in industrial use, the development environment (where changes are originally made) and production ...
Single point of failure. In this diagram the router is a single point of failure for the communication network between computers. A single point of failure ( SPOF) is a part of a system that, if it fails, will stop the entire system from working. [ 1] SPOFs are undesirable in any system with a goal of high availability or reliability, be it a ...