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rrddump(1)                          rrdtool                         rrddump(1)




NAME

       rrddump - dump the contents of an RRD to XML format


SYNOPSIS

       rrdtool dump filename.rrd [filename.xml] [--header|-h {none,xsd,dtd}]
       [--no-header|-n] [--daemon|-d address] [> filename.xml]


DESCRIPTION

       The dump function writes the contents of an RRD in human readable (?)
       XML format to a file or to stdout. This format can be read by
       rrdrestore. Together they allow you to transfer your files from one
       computer architecture to another as well to manipulate the contents of
       an RRD file in a somewhat more convenient manner.

       filename.rrd
               The name of the RRD you want to dump.

       filename.xml
               The (optional) filename that you want to write the XML output
               to.  If not specified, the XML will be printed to stdout.

       --header|-h {none,xsd,dtd}
               By default RRDtool will add a dtd header to the xml file. Here
               you can customize this to and xsd header or no header at all.

       --no-header|-n
               A shortcut for --header=none.

               If you want to restore the dump with RRDtool 1.2 you should use
               the --no-header option since 1.2 cannot deal with xml headers.

       --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 dump --daemon unix:/var/run/rrdcached.sock /var/lib/rrd/foo.rrd


EXAMPLES

       To transfer an RRD between architectures, follow these steps:

       1.  On the same system where the RRD was created, use rrdtool dump to
           export the data to XML format.

       2.  Transfer the XML dump to the target system.

       3.  Run rrdtool restore to create a new RRD from the XML dump. See
           rrdrestore for details.


ENVIRONMENT VARIABLES

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

       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.


AUTHOR

       Tobias Oetiker <tobi@oetiker.ch>



1.7.1                             2019-02-04                        rrddump(1)

rrdtool 1.7.1 - Generated Sat Jun 29 11:27:35 CDT 2019
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