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Computing, Libraries, Tennis, India & other interests of Vikas Kamat

99.9 Uptime

What 99.9% Uptime Really Means It has become fashionable to claim over 99.9% reliability, especially in the Microsoft camp. Web hosting companies, application servers, database servers, why, even Microsoft and friends (Compaq, Dell) have been touting this number as if it's a big deal. Consider this: 99.9% uptime amounts to 8.766 hours of downtime a year. With an average reboot of Windows NT/2000 servers taking 5 minutes, this amounts to 525 unscheduled reboots per year, which amounts to over 10 per week -- more than once a day! Holy cow!! Derived from Competing with Linux FYI: I run both Unix and NT for different tasks. The old Kamat.com server running Unix (BSD) never needed a reboot in 14 months of its use. The new Kamat.com server running Linux since November of 2001 has not been down even for a second. So, achieving 99.9% uptime with Microsoft Windows is very easy. Just reboot the server, about twice a day. See Also: • Unix Vs. NT (in the context of a Web application) (Comments Disabled for Now. Sorry!) First Written: Friday, January 4, 2002 Last Modified: 1/4/2002

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