rrddump (1)

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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 in human readable (?) 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 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 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>