A CIO states, “Our online transaction system has availability of five nines. However, we have a SaaS (software as a service) contract for using a human resources information system. The HR system has availability of only three nines.”
- Calculate the minutes of downtime per week/month/year for each of these systems.
- Explain why the company must have such a high number of nines for one system but can settle for a significantly lower number of nines for the other system.
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Explain why the company must have such a high number of nines for one system but can settle for a significantly lower number of nines for the other system.
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