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man pages section 1: User Commands

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Updated: Wednesday, February 10, 2021

rrdinfo (1)


rrdinfo - extract header information from an RRD


rrdtool info filename [--daemon|-d address [--noflush|-F]]


RRDINFO(1)                          rrdtool                         RRDINFO(1)

       rrdinfo - extract header information from an RRD

       rrdtool info filename [--daemon|-d address [--noflush|-F]]

       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.

               The name of the RRD you want to examine.

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

               Omit the "flush" command usually sent to the daemon prior to
               retrieving the data.  If all you are interested in the the RRD
               Structure, and not the last update time or current values, then
               this will improve efficiency.

       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

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

           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.

       Tobias Oetiker <tobi@oetiker.ch>

       See attributes(7) for descriptions of the following attributes:

       |Availability   | image/rrdtool    |
       |Stability      | Uncommitted      |
       This software was built from source available at
       https://github.com/oracle/solaris-userland.  The original community
       source was downloaded from

       Further information about this software can be found on the open source
       community website at http://oss.oetiker.ch/rrdtool/.

1.5.4                             2015-11-10                        RRDINFO(1)