rrdxport - Online in the Cloud

PROGRAM:

NAME

rrdxport - Export data in XML format based on data from one or several RRD

SYNOPSIS

rrdtool xport [-s|--start seconds] [-e|--end seconds] [-m|--maxrows rows] [--step value]
[--json] [--enumds] [--daemon|-d address] [DEF:vname=rrd:ds-name:CF] [CDEF:vname=rpn-
expression] [XPORT:vname[:legend]]

DESCRIPTION

The xport function's main purpose is to write an XML formatted representation of the data
stored in one or several RRDs. It can also extract numerical reports.

If no XPORT statements are found, there will be no output.

-s|--start seconds (default end-1day)
The time when the exported range should begin. Time in seconds since epoch
(1970-01-01) is required. Negative numbers are relative to the current time. By
default one day worth of data will be printed. See also AT-STYLE TIME SPECIFICATION
section in the rrdfetch documentation for a detailed explanation on how to specify
time.

-e|--end seconds (default now)
The time when the exported range should end. Time in seconds since epoch. See also
AT-STYLE TIME SPECIFICATION section in the rrdfetch documentation for a detailed
explanation of ways to specify time.

-m|--maxrows rows (default 400 rows)
This works like the -w|--width parameter of rrdgraph. In fact it is exactly the same,
but the parameter was renamed to describe its purpose in this module. See rrdgraph
documentation for details.

--step value (default automatic)
See rrdgraph documentation.

--daemon|-d address
Address of the rrdcached daemon. If specified, a "flush" command is sent to the server
before reading the RRD files. This allows rrdtool to return fresh data even if the
daemon is configured to cache values for a long time. For a list of accepted formats,
see the -l option in the rrdcached manual.

rrdtool xport --daemon unix:/var/run/rrdcached.sock ...

--json
produce json formated output (instead of xml)

--enumds
The generated xml should contain the data values in enumerated tags.

<v0>val</v0><v1>val</v1>

DEF:vname=rrd:ds-name:CF
See rrdgraph documentation.

CDEF:vname=rpn-expression
See rrdgraph documentation.

XPORT:vname[:legend]
At least one XPORT statement should be present. The values referenced by vname are
printed. Optionally add a legend.

Output format

The output is enclosed in an xport element and contains two blocks. The first block is
enclosed by a meta element and contains some meta data. The second block is enclosed by a
data element and contains the data rows.

Let's assume that the xport command looks like this:

rrdtool xport \
--start now-1h --end now \
DEF:xx=host-inout.lo.rrd:output:AVERAGE \
DEF:yy=host-inout.lo.rrd:input:AVERAGE \
CDEF:aa=xx,yy,+,8,* \
XPORT:xx:"out bytes" \
XPORT:aa:"in and out bits"

The resulting meta data section is (the values will depend on the RRD characteristics):

<meta>
<start>1020611700</start>
<step>300</step>
<end>1020615600</end>
<rows>14</rows>
<columns>2</columns>
<legend>
<entry>out bytes</entry>
<entry>in and out bits</entry>
</legend>
</meta>

The resulting data section is:

<data>
<row><t>1020611700</t><v>3.4000000000e+00</v><v>5.4400000000e+01</v></row>
<row><t>1020612000</t><v>3.4000000000e+00</v><v>5.4400000000e+01</v></row>
<row><t>1020612300</t><v>3.4000000000e+00</v><v>5.4400000000e+01</v></row>
<row><t>1020612600</t><v>3.4113333333e+00</v><v>5.4581333333e+01</v></row>
<row><t>1020612900</t><v>3.4000000000e+00</v><v>5.4400000000e+01</v></row>
<row><t>1020613200</t><v>3.4000000000e+00</v><v>5.4400000000e+01</v></row>
<row><t>1020613500</t><v>3.4000000000e+00</v><v>5.4400000000e+01</v></row>
<row><t>1020613800</t><v>3.4000000000e+00</v><v>5.4400000000e+01</v></row>
<row><t>1020614100</t><v>3.4000000000e+00</v><v>5.4400000000e+01</v></row>
<row><t>1020614400</t><v>3.4000000000e+00</v><v>5.4400000000e+01</v></row>
<row><t>1020614700</t><v>3.7333333333e+00</v><v>5.9733333333e+01</v></row>
<row><t>1020615000</t><v>3.4000000000e+00</v><v>5.4400000000e+01</v></row>
<row><t>1020615300</t><v>3.4000000000e+00</v><v>5.4400000000e+01</v></row>
<row><t>1020615600</t><v>NaN</v><v>NaN</v></row>
</data>

EXAMPLE 1

rrdtool xport \
DEF:out=if1-inouts.rrd:outoctets:AVERAGE \
XPORT:out:"out bytes"

EXAMPLE 2

rrdtool xport \
DEF:out1=if1-inouts.rrd:outoctets:AVERAGE \
DEF:out2=if2-inouts.rrd:outoctets:AVERAGE \
CDEF:sum=out1,out2,+ \
XPORT:out1:"if1 out bytes" \
XPORT:out2:"if2 out bytes" \
XPORT:sum:"output sum"

ENVIRONMENT VARIABLES

The following environment variables may be used to change the behavior of "rrdtool xport":

RRDCACHED_ADDRESS
If this environment variable is set it will have the same effect as specifying the
"--daemon" option on the command line. If both are present, the command line argument
takes precedence.

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