[rrd-developers] Re: Data Loss on non-contiguous updates

Tobias Oetiker oetiker at ee.ethz.ch
Sun Aug 14 11:50:12 MEST 2005


you are no particularly fond of the minimal-required-heartbeat
option I gather ?

the reason rrdtool does not consider the first value supplied after
a long 'downtime' is that it always assumes that the new value has
been valid since the last time the database got updated ... since
you do not up-date the database less frequently than configured via
mrhb, rrdtool must assume that the value as such has no known
valid-time, it only sets a new start point ... in the case of a
COUNTER type DS the counter value gets stored to be used as a
starting point for the next calulation .


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 / // _ \/ _ \/ /  System Manager, Time Lord, Coder, Designer, Coach
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