As someone currently on the outside of the industry looking in, I have to say that I have great sympathy for the good people at Media Temple and Amazon EC2. Hosting is brutally competitive, and to keep up with the competition you have to promise the impossilble. 99.95% uptime SLA? 100% availability? ZERO DOWNTIME NETWORK? Good luck. It's just impossible. I saw a previous release from Amazon regarding an outage that basically said anything less than perfect was unacceptable and they would not rest until perfection was attained. Well, good luck with that.
If you're a customer of a cloud services provider, you need to take matters into your own hands. I was impressed to see that one company had done their own work with multi-location failover and minimized the impact of the EC2 outage on their business. A hosting provider is just a tool to get the job done, and if you have an application designed to run in one server, or in one datacenter, you have to understand there will be downtime. However if you can take a few providers that deliver somewhere north of 99% uptime on a regular basis, and use them in a solution to distribute your risk, your uptime is going to be pretty good. Pretty good though. Because even with the best providers, the best planning, and the most redundancy in the system, there are going to be failure points you probably won't even consider - until they fail.
Source: http://feedproxy.google.com/~r/thewhir_blogs/~3/bHj8FvnKIfE/042111_Outages_Shmoutages
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