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What is the uptime or availability of Windows Live Hotmail and redundancy architecture (to demonstrate system reliability)?

April 26, 2017Architecture demonstrate Hotmail redundancy reliability system uptime windows live

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What is the uptime or availability of Windows Live Hotmail and redundancy architecture (to demonstrate system reliability)?

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We can only offer broad data and guidance but can be more specific under NDA. The availability goal for Windows Live is 99.9%. The service is distributed (multiple data centers), with distributed front-end and back-end (database) servers. (It is currently averaging at 99.9% – avg between Dec-June ’07).