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rrddump

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 can not
             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>
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