[rrd-users] More observations and questions on COUNTER
linux at thehobsons.co.uk
Sat Oct 23 17:42:53 CEST 2010
Philip Peake wrote:
>Simon, the script forces log data on 30 second boundaries, I use
>calculated times, not "now".
>This includes the NaN value when a data source disappears, and for the
>zero values entered into it every 30 seconds until the source comes back
OK, that rules out a conflict between updates and reset. The bit
about zeros while the data source is away is new - you didn't mention
>I have dumped the DB values, and see exactly what I expect
With all due respect - yu apparently aren't seeing what you expect,
hence the query !
> - increasing
>values, a NaN (well, I actually got two Nans), then a string of zeros
>followed by a HUGE number (rrd thinks a counter rollover occurred, but
>only when it sees a non-zero data value ????) followed by data source
What value does your source have when it comes back online ?
I'd still suggest modifying your script(s) to log the update values
to a text file - it will help enormously if you can provide a set of
update statements that replicates the problem. Without that we are
guessing, and you've already "changed the story" as I was assuming
your were immediately storing real values after the reset (and
wondering why the zeros before the spike).
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