- cloud_dns
By default, Slurm expects that the network addresses for cloud nodes won't be known until creation of the node and that Slurm will be notified of the node's address upon registration. Since Slurm communications rely on the node configuration found in the slurm.conf, Slurm will tell the client command, after waiting for all nodes to boot, each node's IP address. However, in environments where the nodes are in DNS, this step can be avoided by configuring this option.
Martin,
In a nutshell, when slurmd starts, it tells that info to slurmctld. That is the "registration" event mentioned.
Brian Andrus
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