1sockchuck writes: As Sunday's outage demonstrates, the Amazon Web Services cloud is critical to many of its more than 1 million customers. Data Center Frontier looks at Amazon's cloud infrastructure, and how it builds its data centers. The company's global network includes at least 30 data centers, each typically housing 50,000 to 80,000 servers. "We really like to keep the size to less than 100,000 servers per data center," said Amazon CTO Werner Vogels. Like Google and Facebook, Amazon also builds its own custom server, storage and networking hardware, working with Intel to produce processors that can run at higher clockrates than off-the-shelf gear.