By: James The Hamilton

James The Hamilton — Thu, 22 Dec 2011 11:11:18 +0000

The article should mention AWS service level agreements.

http://aws.amazon.com/ec2-sla/
“If the Annual Uptime Percentage for a customer drops below 99.95% for the Service Year, that customer is eligible to receive a Service Credit equal to 10% of their bill (excluding one-time payments made for Reserved Instances) for the Eligible Credit Period. To file a claim, a customer does not have to have wait 365 days from the day they started using the service or 365 days from their last successful claim. A customer can file a claim any time their Annual Uptime Percentage over the trailing 365 days drops below 99.95%.”

60min * 24hrs * 365days = 525600min

525600min * .0005 = 262.8min of downtime a year or about 4.38 hours.

If your internal app has a SLA of 99.999% you will still need to build it in house.

Good luck.

By: Mark Thiele

Mark Thiele — Mon, 19 Dec 2011 17:40:58 +0000

This article could use some additional clarification. I personally would never recommend “generically” that a company build more than they need so they can sell/lease it. The focus of any company should be on maximizing their ability to create, sell, and be efficient in their area of expertise. Becoming a data center provider is not a core element the average company should be attempting to build. Also, there is no magic cutoff point for when generators or redundancy are needed. The fact is, if you’re running critical load in your facility, then you need generators and other facets of redundancy. If you can’t afford to do it, then you should be paying someone else to.

Thanks,
Mark Thiele

Comments on: Do BYO data centers make sense anymore?

By: James The Hamilton

By: Mark Thiele