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Why are load balancers so popular in the first place? I've never seen an architecture diagram for a high availability horizontally scalable system that include

Why are load balancers so popular in the first place? I've never seen an architecture diagram for a high availability horizontally scalable system that included a generic load balancer. When I give system design interviews, it's a bad sign of the interviewee adds a balancer. It ends up being a hand-wavy solution to difficulties on either side of the balancer.

fragmede 3y ago
You haven't seen many architecture diagrams, have you?
- avidiax 3y ago
  I've seen one particular one many times: +---------+ +--------+ |expensive| +------------------+ |internet+-------+ load +--------+a bunch of servers| +--------+ |balancer | +------------------+ +---------+