Re: Temperature sensor

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On Fri, Feb 26, 2010 at 12:27:59PM -0600, Les Mikesell wrote:
> On 2/26/2010 12:11 PM, Dominik Zyla wrote:
> > On Fri, Feb 26, 2010 at 09:57:52AM -0800, John R Pierce wrote:
> >> Dominik Zyla wrote:
> >>> But it'll not give information about temperature in server room.
> >>>
> >>
> >> actually, it sorta can.     find the lowest reading sensor on the
> >> system, probably one on the mainboard...    use a manual thermometer to
> >> read the intake air temp and calculate the delta.
> >>
> >> i think you'll find under normal operating conditions that delta is
> >> pretty constant if the server is under a reasonably consistent workload.
> >
> > True.. We're also doing like this in some of server rooms. But sometimes
> > we had strange values. So this sort of stuff can be not good enough. :)
> 
> If you can get graphs from two different pieces of equipment on the same 
> page you can pretty much see the trend.  A single device might have a 
> fan go bad or something - but that should probably be fixed anyway.  On 
> servers that have variable CPU power you might see temperature 
> variations depending on the load.

You have right. While you checking sensors from few machines, you can
see the trend. Gotta think about changing the way of temperature  monitoring 
here.

-- 
Dominik Zyla

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