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Summer 2013 and winter 2014, there were an inordinate number of power outages in Baker Lab, and other Chem buildings! |
See also
- UPS inventory and status, mostly within ChemIT's Baker 248 server room
- ChemIT's record of recent power outages
Question
When power is initially restored, do you trust it? Or might it simply kick back off in some circumstances?
- Because we don't know the answer to this question following any specific power outage, we are reluctant to turn back on servers right away. Instead, we like to wait ~10-25 minutes.
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Also consider
- When communicate with others, and what gets communicated, for what purpose?
Procedures and reminders
Reboot switches?
- 8 switches support the clusters (out of 12 in the room).
Start
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head nodes, if not on already
- Only a few are on UPS. Those can obviously be left on.
- None should be set to auto-start on power-off.
Confirm
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head nodes accessible via SSH
PuTTY on Windows
Use FMPro to get connection info?! (not the right info there, though...)
Menu => List Machine / User Selections = > List Group or selected criteria
- Machine function => Server HN
Start compute nodes
If nodes done show up, consider:
- Restart Torque scheduler on problematic nodes.
- Try rebooting the switch the affected nodes are connected to, especially if the problematic nodes are grouped to a single switch.
- Hook up a monitor as one of the high nodes boot.