The win_session node

Experimental.

Since 0.17.2

This window refers it's timing to the timestamp contained in the incoming data-items.

A session window aggregates records into a session, which represents a period of activity separated by a specified gap of inactivity. Any data_points with timestamps that occur within the inactivity gap of existing sessions will be added to this session. If a data_point's timestamp occurs outside the session gap, a new session is created. A new session window starts if the last record that arrived is further back in time than the specified inactivity gap.

Example

|value_emitter()
.every(500ms)
.jitter(4600ms)

|win_session()
.session_timeout(4500ms)

|debug('info')

Every data_point, that has a timestamp < last-timestamp + session_timeout, will be member of the current window.

Parameters

Parameter	Description	Default
session_timeout( duration )	also called inactivity gap	3m