[rrd-users] One more question -- Re: Help in need when writing gangnlia python metrics modules

[Robinson Tiemuqinke]

Hi,

 One more question: 

 Can I specify the min/max threshhold values for a metric through some fields in metric descrpitor? If so, how to do it?

 Thanks.




--- On Wed, 12/10/08, Robinson Tiemuqinke <hahaha_30k at yahoo.com> wrote:

> From: Robinson Tiemuqinke <hahaha_30k at yahoo.com>
> Subject: Help in need when writing gangnlia python metrics modules
> To: tobi at oetiker.ch, rrd-users at lists.oetiker.ch
> Date: Wednesday, December 10, 2008, 7:25 PM
> Hi, Tobias and all,
> 
>   I'm writing a ganglia python metrics module to
> monitor haproxy  software's performance. I'm
> following the steps at
> http://ganglia.wiki.sourceforge.net/ganglia_gmond_python_modules.
> the modules does send data back to gmetad but I still
> don't understand the following parameters for
> metrics' descriptors, could you or someone shed a light
> into this:
> 
> The following paragraph is excerpt from the html page:
> 
> -----------------------------------------------------------------
> name: name of the metric 
> call_back: function to call when collecting metric data 
> time_max: maximum time in seconds between metric collection
> calls 
> value_type: string | uint | float | double 
> units: unit of your metric 
> slope: zero | positive | negative | both 
> format: format of your metric 
> description: description of your metric (which is visible
> in web frontend if you hover over host metric graph) 
> group: group of your metric (metrics in the web frontend
> hostview is grouped by this)
> -----------------------------------------------------------------------
> 
> My questions are:
> 
> 1, how can I specify RRD file's heartbeat rate here?
> 
> 2, when the metric has a large int (between 2**32 and
> 2**64) value, which 'value_type' should I specify?
> Is the 'uint' -- probably means unsigned int -- good
> enough?
> 
> 2.1, If I specify 'uint' for 'value_type',
> and the metrics has a negative value '-1' to specify
> the problematic situation where data is not retrievable,
> then what will happen? 
> 
> 3, what do the 'slope' values mean? And how to
> specify it for a particular metric?
> 
> Thanks a lot.
> 
> --Tiemuqinke