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E-MapReduce:ScalingRule

Last Updated:Aug 24, 2026

Parameter

Type

Description

Example

object

The scaling rule configuration.

RuleName

string

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

scalingByYarnMemory

TriggerType

string

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

  • TIME_TRIGGER: time-based scaling.

  • METRICS_TRIGGER: load-based scaling.

TIME_TRIGGER

ActivityType

string

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

  • SCALE_OUT: scale-out.

  • SCALE_IN: scale-in.

SCALE_IN

AdjustmentValue

integer

The adjustment value. This parameter is required and must be a positive number that represents the number of instances to scale out or scale in.

100

TimeTrigger TimeTrigger

The time-based scaling description.

MetricsTrigger MetricsTrigger

The load-based scaling description.

MinAdjustmentValue

integer

The minimum delivery quantity for scale-out.

1