[rrd-users] Re: Need help in RRDtool usage...

[Alex van den Bogaerdt]

Kalpesh Patel wrote:

> Yap I did indeed find them in the doc directory of the package after
> spending some time...unfortunately I was expecting to get basic knowledge in
> the tutorial by Alex at
> http://people.ee.ethz.ch/~oetiker/webtools/rrdtool/tutorial/rrdtutorial.html
> .

Ahum...

2nd paragraph, summarized:  this tutorial gives you enough knowledge
to understand the >documentation<.

"What if I still have problems after reading this document?"
... look in the documentation that came with RRDtool ...


> Although I do have few other questions. Given following options to the
> RRDs::create:
> 
> @options = ("-b", $start, "-s", $step,
>             "DS:rows:GAUGE:$heartbeats:0:U",
>             "RRA:AVERAGE:0.999:1:$runs");

> What is the relationship between $start and $step if I want to start
> collecting the data at a $step when it created for the first time?

I have some problems parsing this sentence.  I'll try to answer:

If you have historic data, you can create a database that started in
the past.  This allows you to enter that historic data.  If you'd use
the default start time of "now", you can only insert data with a time
stamp of "now+1".

This has 0 relationship with "step".

> I would also assume that the tool extrapolates the data for which data
> inserted do not perfectly align the time specified in the step when the
> database is created. Is there anyway to prevent the tool from extrapolating
> the data and take the value that was fed?

No.  If you want that then you're using the wrong tool.

> I also assume that when running the dump function of the RRDtool, the
> database shows NaN entries for time prior to creation time.

Correct.
-- 
   __________________________________________________________________
 / alex at slot.hollandcasino.nl                  alex at ergens.op.het.net \
| work                                                         private |
| My employer is capable of speaking therefore I speak only for myself |
+----------------------------------------------------------------------+
| Technical questions sent directly to me will be nuked. Use the list. | 
+----------------------------------------------------------------------+
| http://faq.mrtg.org/                                                 |
| http://rrdtool.eu.org  --> tutorial                                  |
+----------------------------------------------------------------------+

--
Unsubscribe mailto:rrd-users-request at list.ee.ethz.ch?subject=unsubscribe
Help        mailto:rrd-users-request at list.ee.ethz.ch?subject=help
Archive     http://www.ee.ethz.ch/~slist/rrd-users
WebAdmin    http://www.ee.ethz.ch/~slist/lsg2.cgi