Say I have got a big room loaded with servers and a big cupboard size battery as a ups. Now the electricity fails. Is there some way for the servers to know that they should shutdown? Does the ups send some network broadcast to all the severs? Is that some standard thing?
I'm new to all this, but i've got the feeling it is all very individual.
That would mean a big battery ups is only good if Rudolf kicks in, in the next few minutes.
And when Rudolf is tired you start shutting down the servers manually? Are we really so low-tech?
What are the basic steps to getting a system running safely? Configure the UPS and configure every server to shutdown every piece of software on a shutdown command?