Concepts

Concepts

This page is an overview of Senfi.

Measurement, Metric, Tag

Measurement

Senfi deals with data in a time series. Each sample or record in this time series consists of:

• a timestamp indicating when the data was sampled
• a set of tags
• a set of metrics

A measurement is composed of multiple samples.

Metric

A metric is a discrete reading or unit of data. It can be produced/measured by sensors, equipment, or complex systems. An example of a metric is temperature (eg. 37). A metric may or may not have units associated (eg. degrees Celsius).

Tag

A tag is an attribute of the sample. It is usually used as a way to identify where is the metrics are taken from (eg. device ID). It is also useful for filtering (eg. select all samples from this region).