Off-topic&#x2F;meta:<p>&quot;Oh, and it seems that other people wrote a detailed text about this issue in 2008.&quot;<p>Well ... yeah. We&#x27;ve known about this. And yes, we need to keep making people aware. I&#x27;m also amused by all the young people and their containers: always doing things in a root shell. I&#x27;m waiting for that to implode in a few more years.<p>My point here is that maybe it&#x27;s time we started designing some curricula around these things that people keep rediscovering: Why you do indeed want a <i>relational</i> database manager and probably not a &#x27;NoSQL&#x27; store; and when you <i>do</i> want a NoSQL store. Multiplexing existing systems with VMs; how your VPS works and why it worked so well on mainframes back in the day. (and oh, btw did you know that you can just pull hardware, including CPUs, right out of the mainframe and it&#x27;ll keep doing its job?) Dangerous things we&#x27;ve all done at some point and prime (hands-on) examples of the failures that might ensue...<p>And no, I don&#x27;t mean (necessarily) to teach in schools. Maybe an online collection. &quot;So you wanna &#x27;do computers&#x27; without getting hacked and without re-inventing everything...&quot;