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Re: [hobbit] Custom script, rrd file, GAUGE datatype , UNKN
- To: hobbit (at) hswn.dk
- Subject: Re: [hobbit] Custom script, rrd file, GAUGE datatype , UNKN
- From: "Ralph Mitchell" <ralphmitchell (at) gmail.com>
- Date: Mon, 2 Jun 2008 09:18:56 -0500
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- References: <1211988170.31869.116.camel (at) ripley.rhi.hi.is> <483EE8C4.1080301 (at) lmco.com> <1212173363.31427.2.camel (at) ripley.rhi.hi.is> <961092e10805301303w5f359699tcfb4d83483deda05 (at) mail.gmail.com> <1212400877.11343.23.camel (at) ripley.rhi.hi.is>
On Mon, Jun 2, 2008 at 5:01 AM, Anna Jonna Armannsdottir <annaj (at) hi.is>
wrote:
> On fös, 2008-05-30 at 16:03 -0400, Josh Luthman wrote:
> > Would you mind posting what you did wrong here should someone come
> > across the same situation and want to learn from your mistake?
>
> Of course. :)
> I expected the data in the rrd file to reflect directly
> on the data that appears on the test page in Hobbit.
> When the datatype is DERIVE, the number shown on the test
> page in Hobbit - in this particular case flexlm and the
> data shown is [ MATLAB : 2 ] - then this reflects directly
> on <last_ds> field, the value is 2.
>
> When the dataset is changed to GAUGE, the picture changes.
> The value in the <last_ds> field, is always unknown.
> The value field seems to be an integrated or averaged
> function of the data shown in the test in Hobbit.
This is a feature of rrdtool. When the rrd file is created, it is built
with a specific start time and update interval. If your data is inserted
precisely on the update interval, it should be recorded as given. If the
update is *not* precisely on the update interval, it will be adjusted to fit
a curve based on previous values.
Ralph Mitchell