In message , mark lewis
 writes
>  Re: Re: rsync oddity
>  By: Adrian to invalid@invalid.invalid on Sun Jun 07 2020 13:15:23
>
>
> Adrain> Sometime after packet 18752 it stops talking to the target.
> Adrain> The last packet shown is when my script calls up Gmail to send
> Adrain> the rsync log to me, which it does after the rsync process on
> Adrain> the source machine has ended.
>
>could this be a heat problem like some inexpensive home routers/switches see
>from time to time? a heat problem in which they lose packets or otherwise stop
>processing traffic properly?
>
>you say this happens with only one unit... perhaps apply some more cooling to
>it and see if it helps...
>
>or maybe swap this unit with one of the others that works and see if the
>problem follows the unit...
>

Thanks for the suggestions.

I've got a cron job on each Pi that takes various environment readings
every minute, so I've got a pretty good idea on what is happening
temperature wise.

At the time that it failed on the overnight cron job, the CPU
temperature was 35-37 degrees and the GPU in the same range.  The source
Pi is in a cupboard, and the air temperature in there was 13.3-13.5
degrees at the time.  It uses a switch (Netgear) which is housed in the
same cupboard.

The target Pi had CPU / GPU temperatures of 33-35 and air 14.7-14.8
degrees.  It uses a switch (Netgear) which is co-located with it.

I've seen my various Pis cope with much higher temperatures without any
issue.

The router (Draytek) is in an area where the temperature is in the 19-23
degree region.

Adrian
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