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.\" ========================================================================
.\"
.IX Title "RRDINFO 1"
.TH RRDINFO 1 "2022-04-14" "1.0.50" "RRDtool"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.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 datasources 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 not maximum values defined for either of its
datasources.
.PP
.Vb 10
\& 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 dump.
.SH "AUTHOR"
.IX Header "AUTHOR"
Tobias Oetiker <oetiker@ee.ethz.ch>