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] [
--daemon 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
- 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 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>