[rrd-users] Re: deciphering output of rrdtool dump

[Fernando Nieto]

Hello David, I don't know if there is any documentation but the output is
not difficult. The XML file contains all the RRD information, it's something
like a mixture of rrdtool info and fetch toghether.

The XML file has two "sections":

1- RRD general properties, including data sources definition
2- RRAs (properties and all database values)

   <rrd>

	<!-- Section 1 -->
	<version> ... </version>
	<step> ... </step>
	<last_update> ... </last_update>

	<ds> <!-- DS DEFINITION --> </ds>
	<ds> <!-- DS DEFINITION --> </ds>
	...

	<!-- Section 2 -->
   	<rra> <!-- RRA PROPERTIES AND VALUES --> </rra>
	<rra> <!-- RRA PROPERTIES AND VALUES --> </rra>
	<rra> <!-- RRA PROPERTIES AND VALUES --> </rra>

   </rrd>

DS Definition it has all the DS configuration parameters:

   <ds>
	<name> ... </name>
	<type> ... </type>
	<minimal_heartbeat> ... </minimal_heartbeat>
	<min> ... </min>
	<max> ... </max>
	<last_ds> ... </last_ds>
	<value> ... </value>
	<unknown_sec> ... </unknown_sec>
   </ds>

For every RRA defined, there is one <rra>...<rra> section:

   <rra>
	<cf> ... </cf>
      <pdp_per_row> ... </pdp_per_row>
      <xff> ... </xff>	
	<cdp_prep> <!-- for each ds --> </cdp_prep>
	<database>
	   <!-- ALL DATABASE VALUES: ONE ROW PER RRA SAMPLE  -->
	   <!-- EVERY ROW HAS N VALUES, ONE FOR EACH DS --> 
	</database>
   </rra>

Every row within the database it has one comment with date and timestapm and
the row with one value per data source:

   <!-- DATE / TS --> <row><v><!--ds0--></v><v><!--ds1--></v>...</row>


I hope this was helpfull for you.

best regards,
fernando



> -----Mensaje original-----
> De: rrd-users-bounce at list.ee.ethz.ch 
> [mailto:rrd-users-bounce at list.ee.ethz.ch] En nombre de David 
> L. Oppenheimer
> Enviado el: miércoles, 21 de abril de 2004 3:04
> Para: rrd-users at list.ee.ethz.ch
> Asunto: [rrd-users] deciphering output of rrdtool dump
> 
> I was wondering if there is any documentation on how to 
> decipher the output of rrdtool dump's XML output. The online 
> documentation I found for it does not say anything about what 
> the output means.
> 
> Thanks for any pointers,
> David
> 
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