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Re:Docker in Production: An Update by StreamBright on Thursday February 23, 2017 @02:36PM (#13716980)
>> 120+ containers on 12 hosts

it is virtually irrelevant what you use to run and operate this sort of cluster. it gets tricky when you pass 100 nodes and even trickier when you get to 1000+ nodes in a non-linear fashion. Docker certainly has issues that are pretty severe when you are in the financial space and not a big deal if you are running a popular blog like medium.com for example.

Re:Docker in Production: An Update by user5994461 on Thursday February 23, 2017 @03:41PM (#13717568)
12 nodes running 12 containers (1 per node) each bringing in 12$ a second and you're a multi billion dollars company.

Let's multiply that a few times for dev, test and support systems. Still, no need to have hundreds of nodes.