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Version: V3.2

Analytics

Analytics copies data from one bucket/measurement to another when a trigger event occurs. The main purpose is to keep or sync high-resolution data only around important events.

What this is for

Use Analytics to:

  • keep high-resolution data around an error event for longer retention (copy from a short-retention bucket to a long-retention bucket)
  • sync high-resolution data to the cloud only around specific events, instead of syncing all high-resolution data continuously
important

Analytics does not change what the Collector stores. It duplicates data into a different destination bucket/measurement when triggers evaluate to true.

Settings tab​

The Settings tab defines where data is copied from, where it is copied to, and which time window is captured around the event.

Source bucket​

The bucket where the high-resolution source data is stored.

Destination bucket​

The bucket where Analytics writes the copied data.

tip

Pick a destination bucket with a longer retention policy than the source bucket.

Timeframe before​

How far before the trigger event Analytics should copy data.

  • Unit: milliseconds

Timeframe after​

How far after the trigger event Analytics should copy data.

  • Unit: milliseconds
note

The effective copied window is:
[event_time - Timeframe before, event_time + Timeframe after]

Measurement prefix​

Prefix used when generating the destination measurement name.

Analytics creates a new measurement name by prefixing the source measurement:

  • Source measurement: SensorData
  • Detail name: Alarm_
  • Destination measurement: Alarm_SensorData
important

This prefix determines the destination measurement naming scheme. Keep it stable to avoid creating multiple destination measurements unintentionally.

Last not null​

When enabled, if no data is found in the configured time window, the last not-null value is copied to the new measurement.

Triggers tab​

The Triggers tab defines the event conditions that cause Analytics to copy data.

Trigger list​

  • Click + to add a new trigger.
  • Use the three dots menu on a trigger to Duplicate or Delete it.
  • Selecting a trigger shows its configuration on the right.

Trigger fields​

Measurement​

The measurement (table) the trigger evaluates against.

Field name​

The field/column name within the selected measurement used for evaluation.

Operator​

Comparison operator used for evaluation:

  • <
  • <=
  • =
  • !=
  • >
  • >=

Value(s)​

One or more values used for comparison.

OR-combination of values

If multiple values are provided, they are OR-combined.

Example with operator =:

  • Field value is 7
  • Value(s) are 5 and 7
  • Trigger evaluates to true because at least one value matches.

How triggers and copying work together​

When a trigger evaluates to true, Analytics copies data:

  • from the configured Source bucket
  • into the configured Destination bucket
  • for the configured window: Timeframe before and Timeframe after
  • into a destination measurement name computed using MeasurementPrefix + SourceMeasurement
caution

If you choose large timeframes and triggers fire often, copied data volume can grow quickly. Use tight windows and specific triggers.