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  2. 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 ...

  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. PDF - Wikipedia

    en.wikipedia.org/wiki/PDF

    The PDF 1.4 specification allowed form submissions in XML format, but this was replaced by submissions in XFDF format in the PDF 1.5 specification. XFDF conforms to the XML standard. XFDF can be used in the same way as FDF; e.g., form data is submitted to a server, modifications are made, then sent back and the new form data is imported in an ...

  5. HTTP 404 - Wikipedia

    en.wikipedia.org/wiki/HTTP_404

    Download as PDF; Printable version; In other projects ... (based upon the status code) message. In code 404, the ... the parent site's branding, and sometimes a site ...

  6. Sphinx (documentation generator) - Wikipedia

    en.wikipedia.org/wiki/Sphinx_(documentation...

    Sphinx converts reStructuredText files into HTML websites and other formats including PDF, EPub, Texinfo and man.. reStructuredText is extensible, and Sphinx exploits its extensible nature through a number of extensions – for autogenerating documentation from source code, writing mathematical notation or highlighting source code, etc.

  7. Message passing - Wikipedia

    en.wikipedia.org/wiki/Message_passing

    In computer science, message passing is a technique for invoking behavior (i.e., running a program) on a computer.The invoking program sends a message to a process (which may be an actor or object) and relies on that process and its supporting infrastructure to then select and run some appropriate code.

  8. Mean down time - Wikipedia

    en.wikipedia.org/wiki/Mean_down_time

    The inclusion of delay times distinguishes mean down time from mean time to repair (MTTR), which includes only downtime specifically attributable to repairs. [1] Mean Down Time key factors: SYSTEM FAILURE. Identification & Recovery Time. First, the fact that the system is down must be identified, and maintainers notified & brought to action

  9. Maintenance philosophy - Wikipedia

    en.wikipedia.org/wiki/Maintenance_philosophy

    Excessive down-time is a type of design defect that impacts all large systems. As an example, if a system is built from 1,000 individual computers each with a 3-year Mean Time Between Failure (MTBF), then the whole system will have an MTBF of 1 day. If Mean Time To Repair (MTTR) is 3 days, then the system will never work.