About Event Processor operating modes

Kaspersky MLAD has the following operating modes of the Event Processor service:

• Online mode. In the online mode, the Event Processor processes the incoming stream as episodes. An episode is a sequence of events from the entire stream that is limited by a specific time period and/or the number of events. An episode is formed when one of the following conditions is fulfilled:
  • The episode accumulation time reached the limit defined by the Interval for receiving batch events (sec.) parameter of the Event Processor service.
  • The number of accumulated events reached the limit defined by the Batch size in online mode (number of events) parameter of the Event Processor service.

  Based on an episode received in the event stream, the Event Processor service detects new and/or repeated (stable) events and patterns for each of the defined attention heads. You can configure attention heads in the Event Processor section.

  When an event with the timestamp belonging to a previously processed episode is received, the Event Processor service does not revise the structure of patterns detected during the processing of that episode. The Event Processor service takes into account the events received by Kaspersky MLAD with a delay when detecting patterns during the event history reprocessing in the sleep mode.

• Sleep mode. To improve the quality and structure of the identified patterns, the Event Processor can switch to sleep mode according to the specified schedule. Processing of the event stream in the online mode is paused, and Kaspersky MLAD accumulates incoming events in the internal limited buffer on the server for subsequent processing after the application switches from the sleep mode back to online mode.

  In sleep mode, the Event Processor re-analyzes sequences of events that were previously processed in online mode. To detect more complex pattern structures in the sleep mode, the Event Processor processes sequences of events during longer time intervals than the episode accumulation time in the online mode.

  In the Event Processor service settings, you can configure a schedule for the sleep mode (for example, at the time when the event stream is least intense) and define a time interval for the events analyzed in the online mode to be forwarded for reprocessing in the sleep mode.

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