Looking at friends’ pictures on Facebook or searching résumés on LinkedIn are relatively simple computing tasks in which information is called up, retrieved, and then shipped to a user’s screen from a distant data center. Yet such tasks are handled mostly by powerful microprocessors designed for more complex jobs like number crunching and running operating systems.
That means a waste of electrical power, says Ihab Bishara, director of cloud computing products at Tilera, a chip startup in San Jose, California. Microprocessors serving the cloud are too powerful, he says; in the future, he believes, many tasks carried out in data centers will be handled by cheaper, low-power chips like those his company makes.
Currently, the chips inside data-center servers are nearly all manufactured by Intel, which commands roughly 90 percent of the server market with its family of Xeon microprocessors. Xeon chips have up to 10 processing centers, known as cores, that work in parallel to do hefty computational lifting. In contrast, Tilera’s chips contain up to 100 smaller, lower-power cores. When networked together, the cores are capable of handling common cloud applications like retrieving user data while consuming about half as much electrical power, Bishara claims.
Electrical power use is an increasing economic concern for companies such as Facebook, Salesforce.com, and Google. Data centers now consume about 1.5 percent of the world’s electrical power. Electric bills currently account for one-third of the cost of running a data center, according to recent estimates from Amazon, and that percentage is expected to rise steadily as the price of computer equipment falls.
Some cloud operators are already starting to put computationally intensive jobs on servers that can handle them while shifting simpler tasks to low-power servers, says Reuben Miller, a senior research analyst with IDC. “Large companies [need] processors that are more power efficient,” he says. “It’s creating opportunities.”
Low-power contenders include Tilera as well as SeaMicro, which makes servers using Intel’s Atom processors (and sells them to buyers like France Telecom and Mozilla), and Calxeda, a company that builds low-power servers using mobile-phone chips from ARM Holdings.