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

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.
2. In the navigation pane, choose Rules > Data Forwarding, click Configure Policy. The Flow Control Policies page is displayed.
   Figure 1 Policy configuration page
   

3. In the displayed dialog box, configure parameters and click OK.
   Figure 2 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.