On Mon, Jul 22, 2002 at 10:50:03PM -0700, Doug Clements wrote:
I think the problem with using rrdtool for billing purposes as described is that data can (and does) get lost. If your poller is a few cycles late, the burstable bandwidth measured goes up when the poller catches up to the interface counters. More bursting is bad for %ile (or good if you're selling it), and the customer won't like the fact that they're getting charged for artifically high measurements.
RRDtool takes into account the time at which the sample was collected, and if it does not exactly match the expected sampling period, it is resampled on the fly. See: http://people.ee.ethz.ch/~oetiker/webtools/rrdtool/tutorial/rrdtutorial.html under "Data Resampling" for more information. RRDtool has some quirks when used for billing purposes, but it is not guilty of the error that you describe. -- - mdz