GNU/Linux man pages
Livre :
Expressions régulières,
Syntaxe et mise en oeuvre :
GNU/Linux |
Debian 6.0.0(Squeeze) |
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rrdinfo(1) |
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rrdinfo − extract header information from an RRD
rrdtool info filename [−−daemon address]
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
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":
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.
Tobias Oetiker <tobi@oetiker.ch>
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rrdinfo(1) | |