E-MapReduce:ScalingRule

The trigger mode of the scaling rule. This parameter is required. Valid values:

• TIME_TRIGGER: time-based scaling.
• METRICS_TRIGGER: load-based scaling.

The description of load-based scaling.

The adjustment value of the scaling rule. This parameter is required. The parameter value must be a positive integer, which indicates the number of instances that you want to add or remove.

The description of time-based scaling.

The scaling type. This parameter is required. Valid values:

• SCALE_OUT
• SCALE_IN

The minimum number of instances that must be added in a scale-out activity.

The name of the scaling rule. This parameter is required and cannot be an empty string.