[rrd-users] Re: Problems with multi-DS RRD that gets asynchronous-DS updates
Alex van den Bogaerdt
alex at slot.hollandcasino.nl
Tue Sep 21 01:23:54 MEST 1999
> Argh, lost that bet :-)
> Been thinking about it for a while. What could happen is that
> rrd writes an unknown at time=937503900, verify by dumping the database
> inbetween 937503900 and 937503901.
> You are allowing updates to come once a day, however rrdtool will try
> and create a datapoint when it can (and if I'm right this time, it can).
One more thing: You can allow for some unknown values when building
the RRA. Look at this:
rrdtool create filename [--start|-b start time]
You will probably have set xff to 0.5 which means that half of the
datapoints may be absent while still producing an other-than-unknown
entry in the RRA.
When sampling every 300 seconds and having an RRA which stores one
datapoint per row, there is either 0% or 100% unknown so this won't
change. However, in the "weekly" graph this unknown value should not
be there anymore.
* To unsubscribe from the rrd-users mailing list, send a message with the
subject: unsubscribe to rrd-users-request at list.ee.ethz.ch
More information about the rrd-users