Cloud Failover a Challenge for Amazon Competitors, Too

Amazon, meanwhile, has been accused of not providing a full explanation of what actually went wrong last week. Amazon blamed a "networking event" that "triggered a large amount of re-mirroring" of storage volume, creating a capacity shortage, and lost connections to virtual machines.

Thorsten von Eicken, CTO and founder of RightScale, which provides services that enhance the functionality of Amazon EC2, said Amazon "earns an F" for communication and has failed to offer a root-cause analysis.

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