Computed measurement

This page describes computed measurement in detail.

Overview

As described here, computed measurement is a type of data that is generated from other data sources.

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Design

The first thing to do when designing a computed measurement is to decide what are the inputs and what to output. A computed measurement can specify multiple measurements as input. Metrics and tags in those measurement will then be available to the function that is responsible for generating the output.

Implementation

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 ... JH feedback that it is unclear that you must output a valid measurement. he thought he has to always output something, like NULL during initial invocation ...