Pet -> Cattle -> Herd
Servers are like pets. You give them a name. If they get ill, you nurture them back to health…
VMs [are] like cattle…You number them. If some fall ill, you put them out to pasture and you get a new one.
In this new world of serverless, there is not even cattle anymore. There is only the herd. Only the kind of things that you want to build — the application you want to build and we’ll take care of the management of all the individual pieces underneath that.
-Werner Vogels, CTO of AWS