[Clusterusers] A few nodes rebooted

[Wm. Josiah Erikson]

Hi all,

    In the past 24 hours, compute-1-3 (yesterday), and then last night,
compute-2-9 through compute-2-12 and compute-2-30 all rebooted
themselves and reinstalled due to overheating and/or overwhelming the
UPSes they are plugged into.

    The A/C in the room can't keep up and neither can the UPSes, so I
think I'll try at least temporarily retiring the oldest and least
performance/watt-efficient nodes, which is I think at this point rack 4,
and see if that solves both problems, since we aren't using them for
much anyway.

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Wm. Josiah Erikson
Head, Systems and Networking
Hampshire College
Amherst, MA 01002