Real-time computing Real-time computing A system is said to be hard real-time if the correctness of an operation depends not only upon the logical correctness of the operation but also upon the time at which it is performed. An operation performed after the deadline is, by definition, incorrect, and usually has no value. In a soft real-time system the value of an operation declines steadily after the deadline expires. ...more on Wikipedia about "Hard real-time"
An operation within a larger dynamic system is called a real-time operation if the combined reaction- and operation-time of a task is shorter than the maximum delay that is allowed, in view of circumstances outside the operation. The task must also occur before the system to be controlled becomes unstable. A real-time operation is not necessarily fast, as slow systems can allow slow real-time operations. This applies for all types of dynamically changing systems. The polar opposite of a real-time operation is a batch job with interactive timesharing falling somewhere in-between the two extremes. ...more on Wikipedia about "Real-time"
In computer science real-time computing is the study of hardware and software systems which are subject to a "real- time constraint" —ie. operational deadlines from event to system response. ...more on Wikipedia about "Real-time computing"
In Computer Science, a system is said to be soft real-time if the correctness of an operation depends not only upon the logical correctness of the operation but also upon the time at which it is performed. Tasks completed after their respective deadlines are less important than those whose deadlines have not yet expired. This leads to some tasks not being performed if the system load is too high. ...more on Wikipedia about "Soft real-time"
Timing failure is a failure of a process or part of a process in a synchronous distributed system or real-time system to meet limits set on execution time, message delivery, clock drift rate or clock skew. ...more on Wikipedia about "Timing failure"
Uptime is a measure of the time a computer system has been "up" and running. It came into use to describe the opposite of downtime, times when a system was non-operational. ...more on Wikipedia about "Uptime"
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