U (was: New Threshold Syntax)

* Jochen Bern <Jochen.Bern-RMkW/[email protected]> [2013-08-21 20:31]:
> rrdtool, as the most common basis for performance data backends, allows
> you to provide a non-numerical value 'U' so that you can provide
> complete data*sets* even in cases where single *values* are unknown /
> cannot be determined. PNP4Nagios followed suit and now allows plugins to
> return 'U' in the performance data (replacing the number, still allowing
> the UOM etc.). I think this should make it into an updated perfdata spec
> (which is likely to result from *this* activity sooner rather than later).

D'oh!  During last year's OSMC, I promised Jörg to add this to the
performance data specification, and then I totally forgot about that,
sorry.  Here's a proposal:

https://github.com/nagios-plugins/nagios-plugins/commit/75a4ae68e4

Any objections, corrections, or stylistic improvements?

Holger

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