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  2. Maintenance mode - Wikipedia

    en.wikipedia.org/wiki/Maintenance_mode

    The meaning of maintenance mode depends on the context. In the world of software development , it refers to a point in a computer program 's life when it has reached all of its goals and is generally considered to be "complete" and bug -free.

  3. Downtime - Wikipedia

    en.wikipedia.org/wiki/Downtime

    In computing and telecommunications, downtime (also (system) outage or (system) drought colloquially) is a period when a system is unavailable. The unavailability is the proportion of a time-span that a system is unavailable or offline .

  4. Software maintenance - Wikipedia

    en.wikipedia.org/wiki/Software_maintenance

    In the early 1970s, companies began to separate out software maintenance with its own team of engineers to free up software development teams from support tasks. [1] In 1972, R. G. Canning published "The Maintenance 'Iceberg '", in which he contended that software maintenance was an extension of software development with an additional input: the existing system. [1]

  5. Application lifecycle management - Wikipedia

    en.wikipedia.org/wiki/Application_lifecycle...

    Application lifecycle management (ALM) is the product lifecycle management (governance, development, and maintenance) of computer programs. It encompasses requirements management, software architecture, computer programming, software testing, software maintenance, change management, continuous integration, project management, and release ...

  6. Heartbeat (computing) - Wikipedia

    en.wikipedia.org/wiki/Heartbeat_(computing)

    In computer science, a heartbeat is a periodic signal generated by hardware or software to indicate normal operation or to synchronize other parts of a computer system. [1] [2] Heartbeat mechanism is one of the common techniques in mission critical systems for providing high availability and fault tolerance of network services by detecting the network or systems failures of nodes or daemons ...

  7. List of HTTP status codes - Wikipedia

    en.wikipedia.org/wiki/List_of_HTTP_status_codes

    The server cannot handle the request (because it is overloaded or down for maintenance). Generally, this is a temporary state. [26] 504 Gateway Timeout The server was acting as a gateway or proxy and did not receive a timely response from the upstream server. 505 HTTP Version Not Supported The server does not support the HTTP version used in ...

  8. Timeout (computing) - Wikipedia

    en.wikipedia.org/wiki/Timeout_(computing)

    In telecommunications and related engineering (including computer networking and programming), the term timeout or time-out has several meanings, including: A network parameter related to an enforced event designed to occur at the conclusion of a predetermined elapsed time .

  9. Mean down time - Wikipedia

    en.wikipedia.org/wiki/Mean_down_time

    In organizational management, mean down time (MDT) is the average time that a system is non-operational. This includes all downtime associated with repair , corrective and preventive maintenance , self-imposed downtime , and any logistics or administrative delays.