EMERGING TRENDS IN COMPUTING
CLOUD COMPUTING
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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No downtime
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Unavailable for potentially five minutes a day
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Unavailable for potentially five minutes a month
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Unavailable for potentially five minutes a year
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Detailed explanation-1: -The accepted availability standard for emergency response systems is 99.999% or “five nines” – or about five minutes and 15 seconds of downtime per year (see table below). To achieve five nines, all components of the system must work seamlessly together.
Detailed explanation-2: -4 9s (99.99%) scenario. This availability goal for applications requires the application to be highly available and tolerant to component failures. The application must be able to absorb failures without needing to get additional resources.
Detailed explanation-3: -Cloud availability is often measured in nines. Low-level services may offer two nines (99 percent) uptime. A solid solution may go for four nines (99.99 percent) availability. But when it comes to cloud resiliency, five nines (99.999 percent) uptime is the target most of the industry considers the upper echelon.