[rrd-users] Help in RRD XPORT

[Steve Shipway]

"ERROR: invalid rpn expression in: d1,POP,123"  --  This will assume you have already defined a variable 'd1' using either a DEF or CDEF.  If you haven't then you'll get this error.

As for setting a CDEF to a string value, this is impossible.  RRDTool only handles numerical time-series data, so you cannot get a string output like this using the XPORT function.

Steve

Steve Shipway
University of Auckland ITS
UNIX Systems Design Lead
s.shipway at auckland.ac.nz<mailto:s.shipway at auckland.ac.nz>
Ph: +64 9 373 7599 ext 86487

________________________________
From: Utpal Bora [cs14mtech11017 at iith.ac.in]
Sent: Saturday, 28 March 2015 2:50 a.m.
To: Steve Shipway
Cc: rrd-users at lists.oetiker.ch
Subject: Re: [rrd-users] Help in RRD XPORT

Thank you very much Steve.

rrdtool xport
          DEF:out=if1-inouts.rrd:outoctets:AVERAGE
          CDEF:customvar=out,POP,123
          XPORT:out:"out bytes"
          XPORT:customvar:"Temp" >> /home/temp/abc.xml

I tried as you suggested. However, I am getting the error "ERROR: invalid rpn expression in: d1,POP,123" .
Then I tried using TIME function, which worked fine. Is it that we can use POP function only for time variables?

My requirement is to return the PATH of the database as a STRING in the xml. Is it possible to do so? Or the stack can handle only Time variables or numbers?

rrdtool xport
          DEF:out=if1-inouts.rrd:outoctets:AVERAGE
          CDEF:customvar=out,POP,"/path/to/if1-inouts.rrd"
          XPORT:out:"out bytes"
          XPORT:customvar:"Temp" >> /home/temp/abc.xml


Thanks again.

On Fri, Mar 27, 2015 at 3:48 AM, Steve Shipway <s.shipway at auckland.ac.nz<mailto:s.shipway at auckland.ac.nz>> wrote:
Set up an additional CDEF.

rrdtool xport
          DEF:out=if1-inouts.rrd:outoctets:AVERAGE
        CDEF:customvar=out,POP,12345
          XPORT:out:"out bytes"
          XPORT:customvar:"Temp" >> /home/temp/abc.xml

Now you'll get a column with '12345' in it next to the outoctets column.

Note that you need the 'out,POP' to make customvar a time series, although you throw away the original 'out' value.  You can't just use 'CDEF:customvar=12345'.

Steve

Steve Shipway
University of Auckland ITS
UNIX Systems Design Lead
s.shipway at auckland.ac.nz<mailto:s.shipway at auckland.ac.nz>
Ph: +64 9 373 7599 ext 86487

________________________________
From: rrd-users [rrd-users-bounces+s.shipway=auckland.ac.nz at lists.oetiker.ch<mailto:auckland.ac.nz at lists.oetiker.ch>] on behalf of Utpal Bora [cs14mtech11017 at iith.ac.in<mailto:cs14mtech11017 at iith.ac.in>]
Sent: Friday, 27 March 2015 3:57 a.m.
To: rrd-users at lists.oetiker.ch<mailto:rrd-users at lists.oetiker.ch>
Subject: [rrd-users] Help in RRD XPORT

Hello Everyone,

I am working on a Network Visualization project using RRDTool for my graduate course on Network Engineering.

I want to use the export feature of RRDtool to create an XML where I want to add some hard coded values(DS not in RRD) to the xml.
However, I could not find a solution as of yet.
Please assist me on this.

What I am trying to do -

rrdtool xport \
          DEF:out=if1-inouts.rrd:outoctets:AVERAGE \
          XPORT:out:"out bytes" >> /home/temp/abc.xml
          XPORT:"SOME_CUSTOM_VALUE":"Temp" >> /home/temp/abc.xml

Here I want to append SOME_CUSTOM_VALUE to the output xml, which I am not able to do as SOME_CUSTOM_VALUE is not present in the database.





--
Regards,

Utpal Bora
M. Tech 1st year
Computer Science & Engineering
IIT Hyderabad



--
Regards,

Utpal Bora
M. Tech 1st year
Computer Science & Engineering

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