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here are several factors that exist both in theory and practice that make efficient load balancing an exceptionally hard problem. For instance:
Poisson request arrival times;
Exponentially distributed response latency;
Oscillations when sharing data between multiple load balancers .
You will explore techniques and algorithms such as Randomized Least-conns, Join-Idle-Queue, and Load Interpretation. Load balancing perfectly may be impossible in the real world, but you can do better than “random,” “round-robin,” and naive “least-conns”.
You will walk away with an understanding of why traditional load balancing techniques are sub-optimal, practical techniques for improving it, as well as longer term theoretical approaches. You will also learn what makes load balancing such a difficult problem and why it's impossible to solve precisely.
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Tyler McMullen is CTO at Fastly, where he’s responsible for the system architecture and leads the company’s technology vision. As part of the founding team, Tyler built the first versions of Fastly’s Instant Purging system, API, and Real-time Analytics. Before Fastly, Tyler worked on text analysis and recommendations at Scribd. A self-described technology curmudgeon, he has experience in everything from web design to kernel development, and loathes all of it. Especially distributed systems.