What is observability? What are telemetry data?
About
Observability permits the observation of the state of an application via telemetry data.
There are 3 telemetry data type (known also as dimensions or pillars)
Metrics
Metrics are:
- in-memory time series data
- that permits building a dashboard of your engine, to check the activity of your application
- and alerts in case of issues
Logs
Log are events stored in files. They are managed by an event logger.
There are 2 kinds:
- textual event with a state as INFO or ERROR
- event registration with data (Event Analytics)
They can be:
- processed to derive metrics
- read to see the activity or state of an application and debug any problem.
Trace
Traces logs the stack trace.
They are managed by a tracing system.