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.\" ========================================================================
.\"
.IX Title "RRDINFO 1"
.TH RRDINFO 1 "2008-03-15" "1.3.7" "rrdtool"
.SH "NAME"
rrdinfo \- extract header information from an RRD
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
\&\fBrrdtool\fR \fBinfo\fR \fIfilename.rrd\fR
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
The \fBinfo\fR function prints the header information from an \s-1RRD\s0 in
a parsing friendly format.
.PP
Check rrdcreate if you are uncertain about the meaning of the
individual keys.
.SH "EXAMPLE"
.IX Header "EXAMPLE"
This is the output generated by running \fBinfo\fR on a simple \s-1RRD\s0 which
contains two data sources and one \s-1RRA\s0. Note that the number after the
\&\fIlast_update\fR keyword is in seconds since 1970. The string \fBNaN\fR
stands for \fI*UNKNOWN*\fR data. In the example it means that this \s-1RRD\s0
has neither minimum nor maximum values defined for either of its
data sources.
.PP
.Vb 24
\& filename = "random.rrd"
\& rrd_version = "0001"
\& step = 300
\& last_update = 955892996
\& 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
.Ve
.IP "\fIfilename.rrd\fR" 8
.IX Item "filename.rrd"
The name of the \fB\s-1RRD\s0\fR you want to examine.
.SH "AUTHOR"
.IX Header "AUTHOR"
Tobias Oetiker <tobi@oetiker.ch>