[Xymon] Status, NCV and time stamps

[Boldt, David]

Thanks for these leads. Will looks at both the filter and "trends" message
options.

As a request for enhancement, I think it would be useful to have an option
to use a regexp to extract data from the status, one for each variable.



On Mon, Oct 5, 2015 at 7:36 PM, J.C. Cleaver <cleaver at terabithia.org> wrote:

> On Mon, October 5, 2015 3:52 pm, Boldt, David wrote:
> > I'm in the process of converting Big Brother tests to XYMon and would
> like
> > to enable RRD/graphics for these tests.
> >
> > Several of these tests present date/time information which is important.
> >
> > As a workaround for one test I have replaced the colon on a HH:MM:DD
> > formatted date with a dot, but it doesn't really look like a time
> anymore.
> >
> > * Is there a way to have NCV ignore colons (and only use "=")?
> >
> > * Is there a way to have NCV ignore a line (which might contain colons)?
>
>
> Unfortunately, there isn't a way to do either of these at the moment. I'd
> considered a data parser that looks for a hidden HTML comment marker for
> lines to process (and ignores the rest), but it's not quite present yet.
>
>
> >
> > * Can I use Data messages in such a way that the corresponding Status
> > message is not parsed?
>
> The easiest way to do this would be to add a --filter= option to the
> xymond_channel command line for the xymond_rrd process that's handling the
> *status* channel, but not the data channel.
>
> There's a CPU load hit for doing so (since now you're doing a PCRE on each
> message), however it may not have much of an impact depending on your
> message volume.
>
>
> > * Might there be some other mechanism entirely?
>
> Generally, speaking for more advanced RRD submission, the 'trends' message
> can be a useful data payload which is read directly by xymond_rrd. The
> advantage there (aside from more direct control) is the ability to send
> data points for multiple graphs at once, which could outweigh the expense
> of another message transmission.
>
>
> HTH,
>
> -jc
>
>
>


-- 
                                         -- David Boldt
                                            <dboldt at usgs.gov>


   "Ah, this is obviously some strange usage of the word 'safe' that I
wasn't previously aware of."
    --Douglas Adams (1952 - 2001), Arthur Dent in "The Hitchhikers Guide to
the Galaxy"
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