Facebook today revealed details about Autoscale, a system for power-efficient load balancing that has been rolled out to production clusters in its data centers. The company says it has “demonstrated significant energy savings.” For those who don’t know, load balancing refers to distributing workloads across multiple computing resources, in this case servers. The goal is to optimize resource use, which can mean different things depending on the task at hand. In short, Facebook has switched its load-balancing policy from a modified round-robin algorithm (every server receives roughly the same number of page requests and utilizes roughly the same amount of...
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