[rrd-users] rrdtool Question. traffic after a while does not appear

[Steve Shipway]

> Im currently working with cacti graphing traffic workstations,
> whenever i add a new station took a snapshot of the traffic generated,
> however after a while i consult the chart on the same date and time to
> take the initial capture but traffic doesnt appear, its normal for
> this to happen?

My first thought is that you should take a look at the length of the RRAs you have defined in the RRD file.  If they are not long enough, then the historical data will be deleted due to the 'round robin' nature of the database, though at this point I would have expected the graphing utility to use a larger granularity RRA instead...  possibly you have a single RRA and it is not long enough to hold data as far back as you expect?

Steve

Steve Shipway
ITS Unix Services Design Lead
University of Auckland, New Zealand
Floor 1, 58 Symonds Street, Auckland
Phone: +64 (0)9 3737599 ext 86487
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Email: s.shipway at auckland.ac.nz
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