Can the Cloud Deliver More Up-Time?
One of the oft-stated promises of cloud-based applications is more up-time, more application availability than those deployed via on-premises servers. Some might take the statement at face value; others may question it. I’d like to make the argument that both sides are right.
First let’s agree on a definition of cloud (if just for the time it takes for you to read this blog). Some argue that a single enterprise provisioning applications to their own operations from an owned and operated data center is cloud. I think this is best labeled “private cloud.” Here when I talk about cloud I’ll be referring to multi-tenant applications delivered from a provider’s data centers.
As it turns out, this distinction between private and more public clouds helps answer the question of whether cloud application deployments can deliver more up-time than on-premises deployments. Up-time has costs associated with it. 99% uptime is less expensive to achieve than 99.9, 99.99 or 99.999%.