So, I've run into a situation where there is quite a bit of data  
sitting on a lights out card that I'd like to get access to with  
ganglia. Since it supports IPMI, it seems like a great option, and I'd  
just use ipmitool. Every node has a lights out card, including an  
admin node that can see all of it

1) when running ipmitool on the local host to access the IPMI from the  
lights out card, it's brief (around a half a second for an sdr list),  
but kind of a serious hit (upwards of 10% cpu)  to the node for what  
it's getting out of it. while it's not going to be accessed often  
(once every 10 minutes? 5 minutes?), I'd like to avoid that.

2) running ipmitool from the admin node produces no noticeable impact  
on the node, but sadly ganglia doesn't know that the data is coming  
from somewhere else, and there doesn't appear to be any way to tell  
ganglia (or gmetric for that matter) "hey, send this into the stream  
as belong to something else"... i.e. host spoofing.

anyone else run into this? anyone else using ipmi with ganglia (there  
have been a few references in various googlable pdfs) that would care  
to share? Or perhaps something from the ganglia-dev list that I saw  
regarding it a couple months ago?

Doug Nordwall
Unix Administrator
EMSL Computer and Network Support
Phone: (509)372-6776; Fax: (509)376-0420





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