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  2. High availability - Wikipedia

    en.wikipedia.org/wiki/High_availability

    Another memory trick to calculate the allowed downtime duration for an "-nines" availability percentage is to use the formula seconds per day. For example, 90% ("one nine") yields the exponent 4 − 1 = 3 {\displaystyle 4-1=3} , and therefore the allowed downtime is 8.64 × 10 3 {\displaystyle 8.64\times 10^{3}} seconds per day.

  3. Website monitoring - Wikipedia

    en.wikipedia.org/wiki/Website_monitoring

    Download QR code; Print/export Download as PDF; ... Most web hosts offer a 99.9% uptime guarantee and when uptime is less than that, individuals can be refunded for ...

  4. 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.

  5. Continuous availability - Wikipedia

    en.wikipedia.org/wiki/Continuous_Availability

    Continuous availability is an approach to computer system and application design that protects users against downtime, whatever the cause and ensures that users remain connected to their documents, data files and business applications.

  6. 68–95–99.7 rule - Wikipedia

    en.wikipedia.org/wiki/68–95–99.7_rule

    Diagram showing the cumulative distribution function for the normal distribution with mean (μ) 0 and variance (σ 2) 1. These numerical values "68%, 95%, 99.7%" come from the cumulative distribution function of the normal distribution.

  7. COBOL - Wikipedia

    en.wikipedia.org/wiki/COBOL

    For example, consider the example code above along with the following example: 01 sale-date . 05 the-year PIC 9(4) . 05 the-month PIC 99 . 05 the-day PIC 99 . The names the-year , the-month , and the-day are ambiguous by themselves, since more than one data item is defined with those names.

  8. Kotlin (programming language) - Wikipedia

    en.wikipedia.org/wiki/Kotlin_(programming_language)

    Google itself has 60 apps written in Kotlin, including Maps and Drive. Many Android apps, such as Google Home, are in the process of being migrated to Kotlin, and therefore use both Kotlin and Java. Kotlin on Android is seen as beneficial for its null-pointer safety, as well as for its features that make for shorter, more readable code. [48]

  9. Nines (notation) - Wikipedia

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

    For example, 90% would be described as "one nine"; 99% as "two nines"; 99.9% as "three nines"; and so forth. However, there are different conventions for representing inexact multiples of 9. For example, a percentage of 99.5% could be expressed as "two nines five" (2N5, or N2.5) [ 2 ] or as 2.3 nines, [ citation needed ] following from the ...

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    99.9% uptime in minutes formula calculator app code kotlin example free