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And all the servers? They are supposed to just keep rebooting all the time as if they were Windows desktops?


If you upgrade systemd or the kernel, yes, you should reboot your machine. Ideally, it shouldn't take more than a minute or two.


Obviously not talking about servers here. Those RAID can take more than a few minutes to spin-up.


If you can't afford 3 minutes of downtime (how long a Dell PowerEdge R620 takes to start responding to ping again after a shutdown -r now), you really should reconsider running that service without a redundant system at the ready.




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