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< < | To solve this problem, one node has been designated the "wake-up" box. As of Apr-2012 it's hermes01.nevis.columbia.edu , but it could be any node not connected to a UPS. It goes down when power is cut off, comes back up when power is restored. As soon as it comes back up, it sends a wake-up signal to the servers. If a server has IPMI![]() ![]() | |||||||
> > | To solve this problem, one node has been designated the "wake-up" box. As of Apr-2016 it's kennel00.nevis.columbia.edu , but it could be any node not connected to a UPS. It goes down when power is cut off, comes back up when power is restored. As soon as it comes back up, it sends a wake-up signal to the servers. If a server has IPMI![]() ![]() | |||||||
The BIOS of the "wake-up" is set to bring up the system quickly, unlike the BIOSes of the other systems which are set to delay for as long as possible to give the main servers a chance to come back up. This means the "wake-up" box might come up before NIS and NFS is available on the cluster. This seems a reasonable price to pay for having the rest of the cluster come back up in a working state. |