[ntp:questions] questions Digest, Vol 66, Issue 7

Todd Glassey tglassey at glassey.com
Mon Apr 12 13:12:39 UTC 2010


On 4/11/2010 10:45 PM, questions-request at lists.ntp.org wrote:
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> Today's Topics:
> 
>    1. Monitoring FreeBSD temperatures remotely (David J Taylor)
>    2. Re: Monitoring FreeBSD temperatures remotely (Richard B. Gilbert)
>    3. Re: Monitoring FreeBSD temperatures remotely (unruh)
>    4. Re: Monitoring FreeBSD temperatures remotely (David J Taylor)
>    5. Re: Monitoring FreeBSD temperatures remotely (David J Taylor)
>    6. Re: Monitoring FreeBSD temperatures remotely (Hal Murray)
>    7. backup PPS source (David Lord)
>    8. Re: backup PPS source (Hal Murray)
> 
> 
> ----------------------------------------------------------------------
> 
> Message: 1
> Date: Sun, 11 Apr 2010 14:39:10 +0100
> From: "David J Taylor" <david-taylor at blueyonder.co.uk.invalid>
> To: questions at lists.ntp.org
> Subject: [ntp:questions] Monitoring FreeBSD temperatures remotely
> Message-ID: <hpsjdv$tb5$1 at news.eternal-september.org>
> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
> 	reply-type=original
> 
> I'm trying to correlate the few microseconds NTP offset transient I get in 
> the morning with the temperature of the system (and most likely with the 
> rate of change of temperature).  There seems to be a triangulare-shaped 
> ~7microsecond transient lasting for about an hour when the heating 
> switches on:
> 
>   http://www.satsignal.eu/mrtg/performance_pixie.php
> 
> Do any of the FreeBSD experts out there know if, and how, I might be able 
> to get a temperature measurement of my FreeBSD 8.0 system via SNMP? 
> Ideally, motherboard temperature (Intel D410PT) but disk or CPU 
> temperature would be a start.  I have discovered that the 2.5-inch disk it 
> uses is SMART enabled and does report disk temperature, so tying that in 
> with SNMP so that I can monitor remotely would be a start.....
> 
> My programming skills are mor ein Delphi than C/C++, I'm afraid.
> 
> Thanks,
> David 
> 
> 
> 
> ------------------------------
> 
> Message: 2
> Date: Sun, 11 Apr 2010 10:08:15 -0400
> From: "Richard B. Gilbert" <rgilbert88 at comcast.net>
> To: questions at lists.ntp.org
> Subject: Re: [ntp:questions] Monitoring FreeBSD temperatures remotely
> Message-ID: <o6KdnbBtJa5ISlzWnZ2dnUVZ_tKdnZ2d at giganews.com>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
> 
> David J Taylor wrote:
>> I'm trying to correlate the few microseconds NTP offset transient I get 
>> in the morning with the temperature of the system (and most likely with 
>> the rate of change of temperature).  There seems to be a 
>> triangulare-shaped ~7microsecond transient lasting for about an hour 
>> when the heating switches on:
>>
>>  http://www.satsignal.eu/mrtg/performance_pixie.php
>>
>> Do any of the FreeBSD experts out there know if, and how, I might be 
>> able to get a temperature measurement of my FreeBSD 8.0 system via SNMP? 
>> Ideally, motherboard temperature (Intel D410PT) but disk or CPU 
>> temperature would be a start.  I have discovered that the 2.5-inch disk 
>> it uses is SMART enabled and does report disk temperature, so tying that 
>> in with SNMP so that I can monitor remotely would be a start.....
>>
>> My programming skills are mor ein Delphi than C/C++, I'm afraid.
>>
>> Thanks,
>> David
> 
> There are such things as recording thermometers.  They used to be used 
> in data centers to monitor the temperature.  ISTR recording hygrometers 
> were used to monitor the humidity.  It has been six years since I was 
> inside anybodies data center and this may no longer be an accurate 
> description.
> 
> 
> 
> ------------------------------
> 
> Message: 3
> Date: Sun, 11 Apr 2010 14:27:35 GMT
> From: unruh <unruh at wormhole.physics.ubc.ca>
> To: questions at lists.ntp.org
> Subject: Re: [ntp:questions] Monitoring FreeBSD temperatures remotely
> Message-ID: <slrnhs3n2n.8q7.unruh at wormhole.physics.ubc.ca>
> Content-Type: text/plain; charset=us-ascii
> 
> On 2010-04-11, David J Taylor <david-taylor at blueyonder.co.uk.invalid> wrote:
>> I'm trying to correlate the few microseconds NTP offset transient I get in 
>> the morning with the temperature of the system (and most likely with the 
>> rate of change of temperature).  There seems to be a triangulare-shaped 
>> ~7microsecond transient lasting for about an hour when the heating 
>> switches on:
>>
>>   http://www.satsignal.eu/mrtg/performance_pixie.php
> 
> At the same time, the cpu switches off, network traffic disappears, etc.
> Something weird is happening that does not seem to be temperature.
> 
>>
>> Do any of the FreeBSD experts out there know if, and how, I might be able 
>> to get a temperature measurement of my FreeBSD 8.0 system via SNMP? 
> 
> The intel motherboards use a weird system of sensor reporting, that the
> lmsensors people had not figured out at least as of a year ago. I am
> familiar with linux, but I suspect freebsd is the same. 
> mbmon, healthd are apparently freebsd systems for perhaps getting the
> temp. 
> 
>> Ideally, motherboard temperature (Intel D410PT) but disk or CPU 
>> temperature would be a start.  I have discovered that the 2.5-inch disk it 
>> uses is SMART enabled and does report disk temperature, so tying that in 
>> with SNMP so that I can monitor remotely would be a start.....
>>
>> My programming skills are mor ein Delphi than C/C++, I'm afraid.
>>
>> Thanks,
>> David 
>>
> 
> 
> 
> ------------------------------
> 
> Message: 4
> Date: Sun, 11 Apr 2010 18:16:26 +0100
> From: "David J Taylor" <david-taylor at blueyonder.co.uk.invalid>
> To: questions at lists.ntp.org
> Subject: Re: [ntp:questions] Monitoring FreeBSD temperatures remotely
> Message-ID: <hpt05b$tui$1 at news.eternal-september.org>
> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
> 	reply-type=response
> 
>> There are such things as recording thermometers.  They used to be used 
>> in data centers to monitor the temperature.  ISTR recording hygrometers 
>> were used to monitor the humidity.  It has been six years since I was 
>> inside anybodies data center and this may no longer be an accurate 
>> description.
> 
> Indeed there are, but I'm too mean to stretch to buying such a device when 
> there are at least two temperature sensors inside the PC itself.  Neither 
> do I recall any of the remote thermometers I have looked at providing SNMP 
> access.
> 
> Thanks anyway, Richard.
> David 
> 
> 
> 
> ------------------------------
> 
> Message: 5
> Date: Sun, 11 Apr 2010 18:29:59 +0100
> From: "David J Taylor" <david-taylor at blueyonder.co.uk.invalid>
> To: questions at lists.ntp.org
> Subject: Re: [ntp:questions] Monitoring FreeBSD temperatures remotely
> Message-ID: <hpt0uo$44i$1 at news.eternal-september.org>
> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
> 	reply-type=original
> 
>> The intel motherboards use a weird system of sensor reporting, that the
>> lmsensors people had not figured out at least as of a year ago. I am
>> familiar with linux, but I suspect freebsd is the same.
>> mbmon, healthd are apparently freebsd systems for perhaps getting the
>> temp.
> 
> Thanks for that, Bill.  I've found both the packages, but neither seem 
> well integrated with SNMP.  Does the world have something against SNMP?
> 
> To be honest, the prospect of spending half an hour compiling these 
> packages (like SNMP and SMART monitoring required) rather than just 
> picking up a ready-to-run binary does not appeal greatly either!
> 
> I've made a note of your suggestions, though, and they are appreciated.
> 
> Cheers,
> David 
> 
> 
> 
> ------------------------------
> 
> Message: 6
> Date: Sun, 11 Apr 2010 13:23:11 -0500
> From: hal-usenet at ip-64-139-1-69.sjc.megapath.net (Hal Murray)
> To: questions at lists.ntp.org
> Subject: Re: [ntp:questions] Monitoring FreeBSD temperatures remotely
> Message-ID: <iY-dneGoeJgSjl_WnZ2dnUVZ_v-dnZ2d at megapath.net>
> 
> 
>> Do any of the FreeBSD experts out there know if, and how, I might be able 
>> to get a temperature measurement of my FreeBSD 8.0 system via SNMP? 
>> Ideally, motherboard temperature (Intel D410PT) but disk or CPU 
>> temperature would be a start.  I have discovered that the 2.5-inch disk it 
>> uses is SMART enabled and does report disk temperature, so tying that in 
>> with SNMP so that I can monitor remotely would be a start.....
> 
> You can (probably) get the disk temperture with something like:
>   smartctl -a /dev/ad4
> That will give you everything else too, so you will have to
> write a script to extract the chunk of data you want.
> (Something like grep for Temperature and awk to print the
> column you want.)
> 
> I don't know how to get that to SNMP.
> 


I want to know about non ECC memory based PC's running NTP and how many
NTP errors are caused by single and multi-bit memory errors.

Todd




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