Ramp down settings are available for all items that use parallel repeats. By far the most common use of parallel repeats is in tracks, which are used to implement virtual users. However, the same feature can be used with parallel repeats at the clip- and message-levels.
Track-level properties in the Composition Editor can be used to specify both the Minutes to Ramp Up (formerly Minutes to Ramp in releases prior to Italia 6179.3) as well as two fields for Minutes to Ramp Down and a corresponding End Interval field.
Track-level ramp settings are found in the General tab when a sequenced test clip is in use, Enable Repeat is checked, and Ramp fields are made active whenever parallel is the repeat type and Renew Parallel Repeats is checked (shown below). If these conditions aren't met, then the relevant fields will appear inactive (shown above).
Defining a Ramp for a Track or Timed Clip
Both ramp and ramp down can be defined for a track in the Composition Editor, track-level properties, General tab when the following conditions exist:
- A sequenced test clip is in use in the composition
- Enable Repeat is checked in the track properties, General tab
Ramp fields are made active whenever the additional conditions exist:
- parallel is the track repeat type
- Renew Parallel Repeats is checked
If all of these conditions are met, then the relevant fields will appear active.
Additionally, both ramp and ramp down can be defined for any timed clip, whether manually or evenly timed, in the Composition Editor, clip-level properties, Repeat tab.
For the given track or timed clip make specify the ramp (up or down or both) using the following settings:
- Minutes to Ramp Up – Specify the minutes as an integer to ramp.
- Start Interval – Specify an interval between starts of the repeat(s) of a track. Causes "ramp."
- End Interval – Specify an interval between stops of the repeat(s) of a track. Causes "ramp down."
- Minutes to Ramp Down – Ramp down is also available for timed clips in clip-level composition properties (shown in screenshot above). To define a ramp down, specify the number of minutes of the ramp down or an end interval (when one is entered the UI automatically fills in the opposite one).
The goal of "ramp down" is to increment to less than the current actual number of users. Maestro doesn't "interrupt" or "abort" tracks so it must wait for individual track repeats to end naturally—which means it may not match the rate requested exactly.
- Maximum Duration – Specify the maximum length that tracks are to run. Once the maximum has been reached, new repeats will not be created. Note that maximum duration is measured from the start of the first repeat and does not include "'ramp down." Ramp down, if any, starts after the maximum duration has been reached.
The maximum duration is the sum of the ramp PLUS the intended plateau (expressed as milliseconds). For example, the screenshot above shows a ramp to 500 virtual users over 10 minutes, and then holds for 10 minutes. If no ramp down where defined in the example above, then this setup would work as it did in releases prior to Italia. Adjust the maximum duration accordingly if a ramp down will also be used (shown in the example below).