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>
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