Load Balancing is Impossible

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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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