Reliability: Probability that an entire system will satisfactorily function for a specified period of time., A measure of how long the item performs its intended function., MTBF, the total time in service divided by the number of failures., Failure rate, which is the number of failures divided by the total time in service., High Availability: A measure of the percentage of time the resources are in an operable state., Use numbers like 99.999, known as five 9s., Referred to as 100 percent minus your system's downtime., Is about ensuring that your application's downtime is minimized as much as possible without the need for human intervention.,

Reliability vs High Availability

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