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16 <ul>
18 <li><a href="#name">NAME</a></li>
19 <li><a href="#synopsis">SYNOPSIS</a></li>
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21 <li><a href="#example">EXAMPLE</a></li>
22 <li><a href="#author">AUTHOR</a></li>
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27 <p>
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29 <h1><a name="name">NAME</a></h1>
30 <p>rrdinfo - extract header information from an RRD</p>
31 <p>
32 </p>
33 <hr />
34 <h1><a name="synopsis">SYNOPSIS</a></h1>
35 <p><strong>rrdtool</strong> <strong>info</strong> <em>filename.rrd</em></p>
36 <p>
37 </p>
38 <hr />
39 <h1><a name="description">DESCRIPTION</a></h1>
40 <p>The <strong>info</strong> function prints the header information from an RRD in
41 a parsing friendly format.</p>
42 <p>Check <a href="././rrdcreate.html">the rrdcreate manpage</a> if you are uncertain about the meaning of the
43 individual keys.</p>
44 <p>
45 </p>
46 <hr />
47 <h1><a name="example">EXAMPLE</a></h1>
48 <p>This is the output generated by running <strong>info</strong> on a simple RRD which
49 contains two data sources and one RRA. Note that the number after the
50 <em>last_update</em> keyword is in seconds since 1970. The string <strong>NaN</strong>
51 stands for <em>*UNKNOWN*</em> data. In the example it means that this RRD
52 has neither minimum nor maximum values defined for either of its
53 data sources.</p>
54 <pre>
55 filename = "random.rrd"
56 rrd_version = "0001"
57 step = 300
58 last_update = 955892996
59 ds[a].type = "GAUGE"
60 ds[a].minimal_heartbeat = 600
61 ds[a].min = NaN
62 ds[a].max = NaN
63 ds[a].last_ds = "UNKN"
64 ds[a].value = 2.1824421548e+04
65 ds[a].unknown_sec = 0
66 ds[b].type = "GAUGE"
67 ds[b].minimal_heartbeat = 600
68 ds[b].min = NaN
69 ds[b].max = NaN
70 ds[b].last_ds = "UNKN"
71 ds[b].value = 3.9620838224e+03
72 ds[b].unknown_sec = 0
73 rra[0].cf = "AVERAGE"
74 rra[0].pdp_per_row = 1
75 rra[0].cdp_prep[0].value = nan
76 rra[0].cdp_prep[0].unknown_datapoints = 0
77 rra[0].cdp_prep[1].value = nan
78 rra[0].cdp_prep[1].unknown_datapoints = 0</pre>
79 <dl>
80 <dt><strong><a name="item_filename_2errd"><em>filename.rrd</em></a></strong></dt>
82 <dd>
83 <p>The name of the <strong>RRD</strong> you want to examine.</p>
84 </dd>
85 </dl>
86 <p>
87 </p>
88 <hr />
89 <h1><a name="author">AUTHOR</a></h1>
90 <p>Tobias Oetiker <<a href="mailto:tobi@oetiker.ch">tobi@oetiker.ch</a>></p>
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