[rrd-users] unconstant updateded data source

Marco Flohrer marco.flohrer at informatik.tu-chemnitz.de
Thu Jun 21 20:43:01 MEST 2001


i am currently bussy with the following problem:

our switch updates it's SNMP-Counters (RMON traffic counters to
be precise) in unfixed steps. Sometimes in 2 minutes but sometimes
it takes over 7 minutes. So updating the RRD database in
constant intervalls is a bad idea. Too long intervalls (especially
15 minutes to ensure counter is at least one time updated) is not
an option because i want the collected values as exect as possibly.
So i read the counters every minute to be near real uptdate time. If i
specify minimal values for an RRA, "unknown" (xff is 0.0) will be written
to the database if counter ist not updated in this minute but i can't find
the "best" "--step" value for rrdcreate. Too long steps gives a very
step-stoned graph and too short "--steps" gives a graph going up and down.

Hm, to make it short: What would be the best solution for
such data sources?


mailto: marco.flohrer at informatik.tu-chemnitz.de
talk:   mafl at diamond.csn.tu-chemnitz.de

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