"Outages will happen as a matter of course," Leong says. "It can't really be helped when you take into consideration all of the permutations of all the services riding on these infrastructures. There is no way every contingency can be tested for."
CSA's Reavis warns that customers should be prepared for other kinds of failures in the cloud in 2013 as well: business failures.
Since we are in a natural part of the entrepreneurial business cycle for cloud, we can expect to see several cloud startups get acquired, change their business focus or go out of business entirely, Reavis says.
"These shakeouts will have differing consequences impacting the availability of customer data and information systems. Customers need to make sure they are mitigating these risks through a combination of building redundancy in cloud security architectures and performing due diligence in cloud business relationships," he says.
Burns is a freelance writer. She can be reached at email@example.com.