Saturday, February 26, 2011

How to achieve less than 1 minute downtime (99.9999% uptime) a year?

If you have a minute, I'd like to invite your to thinks about this:

If a cloud vendor offers 99.9% uptime, it would be about 9 hours of downtime in a year, business continuity would be affected. How does a 24x7 call center using (does not offer SLA) log cases when it goes down for 9 hours?

What if we have another independent Standby Cloud application that can cover the 9 hours at 99.9% uptime, or whenever the primary system goes down?
If my math is correct, it goes like this:
  • The downtime for the primary system: 0.1% x 365 days x 24 (hours) = 8.76 hours.
  • If the Standby Cloud application has 99.9% uptime, or 0.1% down time, during the 8.76 hours of coverage, it would be 8.76 hours x 0.1% = 0.0876 hours =31.5 seconds
  • The 31.5 seconds downtime translates into 99.9999% up time.

A Standby Cloud application can dramatically enhancement your SLA to a level that you might have never heard of.
If you think this subject is interesting, you should definitely check out our 24x7 Standby application.

Ray Zhu
Founder, Hubcase


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