Help Center/ IoT Device Access/ User Guide/ Rules/ Data Forwarding Flow Control Policies
Updated on 2024-11-06 GMT+08:00
View PDF
Share

Data Forwarding Flow Control Policies

Overview

You can create flow control policies in different dimensions on IoTDA based on your service scenarios and performance of the forwarding target (such as a third-party application server) to control data forwarding flows.

Dimensions of Flow Control Policies

Table 1 Types of flow control policies

Policy Type

Description

By instance

The policy applies to all data forwarding flows on the instance. Data that exceeds the threshold will be discarded.

By forwarding target

The policy applies to all data forwarding flows of the forwarding target you specify.

By forwarding rule

The policy applies to all data forwarding flows of the forwarding rule you specify. Data that exceeds the threshold will be discarded.

By forwarding action

The policy applies to all data forwarding flows of the forwarding action you specify.
  1. After a flow control policy is created, the policy type cannot be modified.
  2. Data that exceeds the threshold set in instance- and rule-level flow control policies will be discarded. Use flow control policies carefully.
  3. If you create different types of flow control policies, the policy with the threshold reached first takes effect. For example, if the threshold in the flow control policy for forwarding rule A is 50 TPS, the threshold in the policy for action B of forwarding rule A is 100 TPS, and the actual data flow of forwarding rule A is 80 TPS, the flow control policy for forwarding rule A is triggered.

Constraints

You can create up to four flow control policies for an IoTDA instance.

Procedure

  1. Access the IoTDA service page and click Access Console. Click the target instance card.
  2. In the navigation pane, choose Rules > Data Forwarding, and click Configure Policy. The Flow Control Policies page is displayed.

    Figure 1 Data forwarding - Policy configuration

  3. In the displayed dialog box, configure parameters and click OK.

    Figure 2 Data forwarding - Creating a flow control policy
    Table 2 Parameters

    Parameter

    Description

    Policy Name

    The value can contain 4 to 256 characters. Only letters, digits, and special characters (_?'#().,&%@!-) are allowed.

    Description

    Description of the policy. The value can contain 4 to 256 characters. Only letters, digits, and special characters (_?'#().,&%@!-) are allowed.

    Threshold

    The value ranges from 1 to 1000.

    Policy Type

    The options include By instance, By target, By rule, and By action.

    Forwarding Target

    Forwarding targets supported by the current instance. This parameter is available only when Policy Type is set to By target.

    Bound Rule

    Data forwarding rules on IoTDA. This parameter is available only when Policy Type is set to By rule.

    Bound Action

    Data forwarding actions on IoTDA. This parameter is available only when Policy Type is set to By action.

Parent topic: Rules