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$vt_dummy

The $vt_dummy virtual table generates dummy events.

// returns 10 dummy events
dataset="$vt_dummy" event<10

Purpose

Use $vt_dummy to test your queries with dummy data.

The event predicate lets you specify the number of events, and the second predicate lets you simulate a long-running query. Using both lets you simulate a burst of events over a specific time range.

Permissions

All types of Search Members can use the $vt_dummy virtual table.

Syntax

dataset="$vt_dummy" event<5 second<3

Parameters

NameTypeRequiredDescription
NumberOfEventsintNoThe number of events to generate.

If used together with SearchRuntime, generates the NumberOfEvents per second, over the course of the SearchRuntime.

If not specified, generates one event.
SearchRuntimeintNoThe desired runtime of the simulated search, in seconds.

Returns

Returns dummy events according to the specified criteria. Each event contains the following fields:

FieldDescription
_timeThe event’s timestamp.
eventThe event’s ordinal number.

Examples

Generate one dummy event, with an additional field foo set to 42.

dataset="$vt_dummy"
  | extend foo=42

Generate five dummy events.

dataset="$vt_dummy" event<5

Generate one event per second, over the course of 10 seconds.

dataset="$vt_dummy" second<10

Generate three events per second, over the course of 10 seconds.

dataset="$vt_dummy" event<3 and second<10