You can only guarantee the uptime on a redundant Web cluster if the network and datacenters you're using are world-class. In our case, we're only able to offer the aggressive SLAs that we do because we're using Rackspace's Superstructure.

The first piece of the Superstructure platform is the datacenter. Rackspace data centers are known as being the best in the business. They're owned and operated by Rackspace and have redundancy in all the critical systems (like power systems, HVAC systems, etc.) They're built for exceptional uptime and are all SAS-70 compliant.

Next up the Superstructure stack is Rackspace's Zero Downtime Network. Rackspace continually ranks at the top of all infrastructure companies for uptime with a network that hasn't been down for even a second over the last 4 years. The network is engineered to ensure that packets of information are delivered to customers in the fastest way possible. They accomplish this using a variety of best-of-breed technologies as well as some proprietary tools they've developed themselves. In fact, the reason Net Locations can offer such an aggressive SLA is because Rackspace itself does - 100% network availability.