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The article is very detailed and does a great job, but they don't mention DigitalOcean load balances.

Load balancers are a must have infrastructure puzzle piece these days. DO did a fantastic job on their lb offering and for $20 a month they are quite powerful (http and tcp) with configurable health checks and failover.

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I've been using a Linode load balancer for three years now (it's also $20/mo), in front of a bunch of vps's.

Allows me to have zero-downtime upgrades by switching servers out of the rotation, and also not be concerned if individual servers die or are rebooted (which is very rare anyway).

I have 2x $10 instances with HAProxy that run circles around anything any provider gives you.

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