[rrd-users] retrieving lower level information from defined higher level archieves
s.shipway at auckland.ac.nz
Mon Nov 29 02:35:44 CET 2010
Short answer is no - RRDTool is good, but it is not psychic. It cannot create information out of thin air! If you have only supplied per-hour data, then it cannot provide accurate per-minute data. If you ask for per-minute data, it will give you the best it can - even if this means a single per-hour sample.
What you *can* do, is to request a graph for a small time window, and the best data available will be used. This might result in a very blocky graph if the required and available intervals differ greatly!
For 'fetch' and 'graph', RRDTool always attempts to do the best it can using the available data. If you haven't given it adequate data, you won't get a very good result, as with any system.
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Email: s.shipway at auckland.ac.nz<mailto:s.shipway at auckland.ac.nz>
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From: rrd-users-bounces+s.shipway=auckland.ac.nz at lists.oetiker.ch [mailto:rrd-users-bounces+s.shipway=auckland.ac.nz at lists.oetiker.ch] On Behalf Of josh joshua
Sent: Monday, 29 November 2010 5:05 a.m.
To: rrd-users at lists.oetiker.ch
Subject: [rrd-users] retrieving lower level information from defined higher level archieves
I have rrd file with weather day captured per day, per month. Suppose I want to find out weather condition for minute, is it possible to do that from given rrd graph?
To be precise, currently my RRD file has RRA defined for per day , per month. Without adding new RRA which corresponds to per hour or per minute, can I retrieve data using currently available information (per month, per day) ?
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