[Xymon] rrd data capture and multiple tests with missing data

[Michael T Pins]

Boldt, David writes:

>In a test defined to store 4 values for graphing I am unable to
>arrange for the storage of the available information if
>information for any variable is missing.

>In many runs of the test not all of the variables will have data.

>I've tried:

> * omitting the variables where there are no values
> * listing the variable without data
> * setting the value to NaN for missing data
> * setting the value to a number below the rrd "--minimum" for the variable

>In all of these cases no data is stored for the interval if any of the
>variables has no data. (Am using NCV parsing of the status.)

>I am able to store and graph the data for all 4 variables if I set missing
>values to zero, but this provides unsatisfactory looking graphs and
>incorrect averages.

>xymon version 4.3.28 on CentOS 7.

Use SPLITNCV rather than NCV, then use FNPATTERN in graphs.cfg.