Feedback Control for Computer Systems - PDF
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This is a book about feedback control—not a topic that programmers (among others) tend to know much about. This is a pity, because feedback control was originally devised to solve a problem that should be all too familiar to software engineers, especially those who are working on enterprise systems. Feedback control is a way to make sure that large, complicated systems run reliably, even when subject to external disturbances, and to make efficient use of constrained resources. If you are looking for a system that can spin up some additional servers when traffic in your data center spikes and take them down again when the rush is over, then you have come to the right place.