The Impulse source generates a stream of events at a specified interval. It is useful for testing and can be used to drive more complex generated sources.

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Configuring the Connection

Impulse sources can be created via the Web UI or directly in SQL.

An impulse connection has several required and optional fields:

FieldDescriptionRequiredExample
event_rateThe number of messages per second to produceYes100
event_time_intervalThe number of microseconds between the event times of subsequent events emitted by the source; if not set wall-clock time is usedNo200000
message_countIf set, the source will finish after emitting this many messages; otherwise it runs indefinitelyNo50000

An impulse source can be created in SQL like this:

CREATE TABLE impulse WITH (
    connector = 'impulse',
    event_rate = 100
);