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  2. Availability - Wikipedia

    en.wikipedia.org/wiki/Availability

    Availability is the probability that an item will be in an operable and committable state at the start of a mission when the mission is called for at a random time, and is generally defined as uptime divided by total time (uptime plus downtime).

  3. High availability - Wikipedia

    en.wikipedia.org/wiki/High_availability

    High availability (HA) is a characteristic of a system that aims to ensure an agreed level of operational performance, usually uptime, for a higher than normal period. [1] There is now more dependence on these systems as a result of modernization.

  4. Five nines - Wikipedia

    en.wikipedia.org/wiki/Five_nines

    Printable version; In other projects Wikidata item; Appearance. move to sidebar hide. Five nines, commonly taken to mean "99.999%", may refer to: High availability of ...

  5. Uptime - Wikipedia

    en.wikipedia.org/wiki/Uptime

    Uptime is a measure of system reliability, expressed as the period of time a machine, typically a computer, has been continuously working and available. Uptime is the opposite of downtime . Htop adds an exclamation mark when uptime is longer than 100 days.

  6. Availability (system) - Wikipedia

    en.wikipedia.org/wiki/Availability_(system)

    Availability is the probability that a system will work as required when required during the period of a mission. The mission could be the 18-hour span of an aircraft flight.

  7. Nines (notation) - Wikipedia

    en.wikipedia.org/wiki/Nines_(notation)

    1 troy ounce of four nines fine gold (999.9) Nines are an informal logarithmic notation for proportions very near to one or, equivalently, percentages very near 100%. Put simply, "nines" are the number of consecutive nines in a percentage such as 99% (two nines) [1] or a decimal fraction such as 0.999 (three nines).

  8. Website monitoring - Wikipedia

    en.wikipedia.org/wiki/Website_monitoring

    Website monitoring can be done from both inside and outside of a corporate firewall.Traditional network management solutions focus on inside the firewall monitoring, whereas external performance monitoring will test and monitor performance issues across the Internet backbone and in some cases all the way to the end-user.

  9. List of unusual units of measurement - Wikipedia

    en.wikipedia.org/wiki/List_of_unusual_units_of...

    Valve's Source game engine uses the Hammer unit as its base unit of length. This unit refers to Source's official map creation software, Hammer. [1] The exact definition varies from game to game, but a Hammer unit is usually defined as a sixteenth of a foot (16 Hammer units = 1 foot).