There is no point in building an unreliable system however building resiliency into your system and environment only reduces the potential for failure, it does not eliminate it.
With user driven systems this is not so much an issue. If the system fails, the user can check to see if the system has been updated and continue working.
With computer driven mass processing systems problems tend to be multiplied by the rate at which the system works. Therefore a timely resolution to a failure may be impossible.
It is therefore essential for computer driven systems to have a means of recovering from a failure in a timely manner.
Without the recovery processes your system may not be as reliable as you may think.
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