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Re: [hobbit] Re: Help - NCV graph issue
- To: hobbit (at) hswn.dk
- Subject: Re: [hobbit] Re: Help - NCV graph issue
- From: "Ralph Mitchell" <ralphmitchell (at) gmail.com>
- Date: Fri, 29 Jun 2007 23:19:35 -0500
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- References: <BC6F36006CC89243A4928FE82E8F4B84032A807B (at) msitmx03.na.fellowes.com>
On 6/29/07, White, Bruce <bewhite (at) fellowes.com> wrote:
Hi all,
I have yet a different problem with an NCV graph.
I have a script which monitors are UPS. In the script it captures the
current load. I have set-up the hobbitserver.cfg file and hobbitgraph.cfg
files based on the examples and it is storing the data and producing the
graph, but the numbers don't match. When I do an rrdtool dump I see the
current data point is ok (like 29% and I see that 29 is the current
datapoint). When it graphs it, it shows it as 8. I have tried playing
with the data types and that doesn't help.
Any ideas?
RRD expects the data at rigidly specified intervals. Any datum
entered slightly off the expected interval is "extrapolated" to fit
the correct interval. If you manage to get it *really* close to the
correct time, then it goes in almost untouched. I'm guessing you
could be hitting somewhere in the middle of the interval, for it to be
so wildly out
Or I'm completely wrong... :) It's worth looking into, though,
because the extrapolation does happen.
Ralph Mitchell