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Tag: uptime

Uptime of web services

Sometime we found 99%, 99,95% etc of uptime guarantee in web services and hosting.
This is a little table of how many hours in one year we can have downtime according of uptime percents:

 

hours in one year: 8765,81277

uptime guarantee H uptime max downtime in one year
99,00% 8678,15 87,66 H
99,10% 8686,92 78,89 H
99,50% 8721,98 43,83 H
99,90% 8757,05 8,77 H
99,95% 8761,43 4,38 H
99,99% 8764,94 0,88 H