the thing I don't like about controlled PDUs is that they're pretty
harsh - don't you expect a higher failure rate of node PSUs if you go
yanking the power this way?
I have only seen a handful of different IPMI interfaces, but they all
were reasonably reliable.
In using the ethernet interfaced PDU's for the past 8 years on several
clusters, I haven't noticed a high PSU failure rate. In all honesty, we
haven't had a unit connected to them ever lose a power supply. One
benefit of using the PDU solution is one enet for X machines rather than
X additional enets for X machines. That being said, IPMI offers
additional functionality not provided by the PDU's.
Mike Davis
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