[rrd-users] Re: Preventing counter wraps

[alex at ergens.op.Het.Net]

Jerome Fleury wrote:

> Is there any way to prevent RRDTool from detecting counter wraps ?

> I mean: when my equipment reloads itself, counters reset, and rrdtool
> assumes it is a counter wrap, that is not, and generates peaks on the
> graph.

> I need a way to tell RRD not to assume counter wraps for an update made
> just after a reboot.

> Please don't tell me to use rrd boundaries (min and max values), because
> it can't work on fully loaded gigabit interfaces (my peaks are about
> 100Mb).

It will work if you use the 64-bit counters...

As for skipping that update:
This is something that the front end should do.  If the counters are
measured every 300 seconds and if the uptime < 300 seconds, a reload
has occured.  Write an "U" to the database.  You could also keep track
of the previously read value and compare ...

regards,
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