The generator test that was scheduled for yesterday was postponed, due to Boards of Examiners being held by one of the other Schools. The new date is expected to be 2020-06-23 (Tuesday next week) at 09:00.
Reminder: when the power is switched over and the generator starts then, as usual
Note: the even-numbered bars have long on-delay settings, as discussed previously and before that and before that, so won't turn their outlets back on for quite a while after the power is restored (see here for details; times are in seconds).
Note also: the GPU-rack bars have NO UPS protection. They will all turn off when the power glitches. They also have long turn-on delays, which might or might not cover the entire test.
Suitable precautions will need to be taken.
Most, though not all, of our edge switches rebooted as a result of last Friday's power faults. We've actually been seeing odd grumbles from the KB UPSes for a while, which might be part of the same problem. Some models of switch seemed to be more resilient to power wobbles than others, but there doesn't appear to be any obvious reason in most cases why the same model of switch sometimes rebooted and sometimes stayed up.
harrison, the GPS clock, lost its time synchronisation
and had to be power-cycled to recover it. We'll look at local UPS protection
for it when we get a chance.
To remove hosts from remote.inf you need to do three things:
oramo, edit /var/lcfg/conf/DNS/zone.remote.inf and remove all of the entries pointing to hosts that you want to remove. (The script tries to preserve the mappings between users and machines to make session resumption easier. If that's not a concern, the file can just be removed, or moved aside, as it will be completely regenerated in the next step anyway. If it is removed, though, it's important that the next step is not then missed out.)
oramo, run /usr/lib/lcfg/dns/generateRemoteInf to generate a new zone. Users not already allocated to a machine will be spread across the remining ones in the remoteHostList map.
lab.inf comes from a netgroup, so for that one you need to:
oramo, run /usr/lib/lcfg/dns/generateLabInf to generate a new zone.
This is also covered in our DNS care and feeding document.
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