rrdresize(1) [centos man page]

RRDRESIZE(1)							      rrdtool							      RRDRESIZE(1)

NAME

       rrdresize - alters the size of an RRA and creates a new .rrd file

SYNOPSIS

       rrdtool resize filename rra-num	GROW|SHRINK rows

DESCRIPTION

       The resize function is used to modify the number of rows in an RRA.

       filename
	       the name of the RRD you want to alter.

       rra-num the RRA you want to alter. You can find the number using rrdtool info.

       GROW    used if you want to add extra rows to an RRA. The extra rows will be inserted as the rows that are oldest.

       SHRINK  used if you want to remove rows from an RRA. The rows that will be removed are the oldest rows.

       rows    the number of rows you want to add or remove.

NOTES

       The new .rrd file, with the modified RRAs, is written to the file resize.rrd in the current directory.  The original .rrd file is not
       modified.

       It is possible to abuse this tool and get strange results by first removing some rows and then reinserting the same amount (effectively
       clearing them to be Unknown). You may thus end up with unknown data in one RRA while at the same timestamp this data is available in
       another RRA.

AUTHOR

       Alex van den Bogaerdt <alex@vandenbogaerdt.nl>

1.4.8								    2013-05-23							      RRDRESIZE(1)

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>

1.4.7								    2009-04-20								RRDINFO(1)