Billing/95th Percentile - Aggregate in/out on billing calculation?

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Component | Version
--------- | -------
LibreNMS  | 1.45-14-g4e8acdd
DB Schema | 270
PHP       | 7.2.11
MySQL     | 5.5.60-MariaDB
RRDTool   | 1.4.8
SNMP      | NET-SNMP 5.7.2
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We have a new LibreNMS install and we’re hoping to use it to replace our in-house 95th percentile billing system.
However, it appears LibreNMS uses the higher of the sampled input or output measurements as the 95th percentile value. Our current system combines the input and output bits at the time of ingest from the RRD (so, we get a combined value every 5 minutes) and runs the 95th percentile calculation on that combined value.

We cannot just add the input and output 95th percentile in LibreNMS, as those values are at different times.

Is what we’re hoping to do possible with a configuration option or similar?

Afaik, LibreNMS 95th is in + out.

At least, it give us “exactly” the same as our transit provider says from cacti’s 95th percentile, which is in+out.

Or maybe I missunderstood what you mean.

That’s what it appears to be, for sure. I was just wondering if there’s a way to make it aggregate in+out.