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CentOS 7.0 - man page for rrdinfo (centos section 1)

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RRDINFO(1)				     rrdtool				       RRDINFO(1)

NAME
       rrdinfo - extract header information from an RRD

SYNOPSIS
       rrdtool info filename [--daemon address]

DESCRIPTION
       The info function prints the header information from an RRD in a parsing friendly format.

       Check rrdcreate if you are uncertain about the meaning of the individual keys.

       filename
	       The name of the RRD you want to examine.

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

EXAMPLE
       This is the output generated by running info on a simple RRD which contains two data
       sources and one RRA. Note that the number after the last_update keyword is in seconds
       since 1970. The string NaN stands for *UNKNOWN* data. In the example it means that this
       RRD has neither minimum nor maximum values defined for either of its data sources.

	filename = "random.rrd"
	rrd_version = "0001"
	step = 300
	last_update = 955892996
	header_size = 2872
	ds[a].type = "GAUGE"
	ds[a].minimal_heartbeat = 600
	ds[a].min = NaN
	ds[a].max = NaN
	ds[a].last_ds = "UNKN"
	ds[a].value = 2.1824421548e+04
	ds[a].unknown_sec = 0
	ds[b].type = "GAUGE"
	ds[b].minimal_heartbeat = 600
	ds[b].min = NaN
	ds[b].max = NaN
	ds[b].last_ds = "UNKN"
	ds[b].value = 3.9620838224e+03
	ds[b].unknown_sec = 0
	rra[0].cf = "AVERAGE"
	rra[0].pdp_per_row = 1
	rra[0].cdp_prep[0].value = nan
	rra[0].cdp_prep[0].unknown_datapoints = 0
	rra[0].cdp_prep[1].value = nan
	rra[0].cdp_prep[1].unknown_datapoints = 0

ENVIRONMENT VARIABLES
       The following environment variables may be used to change the behavior of "rrdtool info":

       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>

1.4.8					    2013-05-23				       RRDINFO(1)
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