Last year’s fairly significant — AWS outage highlighted the challenges that delivering consistent data center uptime presents. The ongoing challenge of keeping a data center online is a highly complex and often underestimated task, but one that provides the bedrock of any public cloud availability. If the data center fails, the cloud will be offline, and a cloud is only as good as the data center in which it resides.

As target data center availability nears 100 percent, each small increase in availability requires an order of magnitude increase in complexity, which further increases depending on the level of data center. For instance, running a Tier IV facility is vastly more complex than running a Tier III facility, running a Tier III facility is more complex than a Tier II facility, and so on. So, naturally, each availability improvement is more difficult and complex to achieve at each corresponding…

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