rrdfirst(1) [centos man page]

RRDFIRST(1)							      rrdtool							       RRDFIRST(1)

NAME

       rrdfirst - Return the date of the first data sample in an RRA within an RRD

SYNOPSIS

       rrdtool first filename [--rraindex number]

DESCRIPTION

       The first function returns the UNIX timestamp of the first data sample entered into the specified RRA of the RRD file.

       filename
	       The name of the RRD that contains the data.

       --rraindex number
	       The index number of the RRA that is to be examined. If not specified, the index defaults to zero. RRA index numbers can be
	       determined through rrdtool info.

AUTHOR

       Burton Strauss <Burton@ntopSupport.com>

1.4.8								    2013-05-23							       RRDFIRST(1)

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] [--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>

1.4.3								    2009-10-14								RRDDUMP(1)