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Creating a Bandwidth Scaling Policy

Updated on 2024-04-25 GMT+08:00

Scenarios

You can automatically adjust your purchased EIP bandwidth and shared bandwidth using a bandwidth scaling policy. This section describes how to create a bandwidth scaling policy.

When creating a bandwidth scaling policy, you need to configure basic information. The system supports three types of bandwidth scaling policies: alarm-based, scheduled, and periodic.

The basic information for creating a bandwidth scaling policy includes the policy name, policy type, and trigger condition.

Creating an Alarm-based Bandwidth Scaling Policy

  1. Log in to the management console.
  2. Under Computing, click Auto Scaling. In the navigation pane on the left, choose Bandwidth Scaling.
  3. Click Create Bandwidth Scaling Policy.
  4. Set parameters, such as the policy name, policy type, and trigger condition. For details, see Table 1.
    Table 1 Alarm policy parameters

    Parameter

    Description

    Example Value

    Region

    Specifies the region where the AS group resides.

    N/A

    Policy Name

    Specifies the name of the bandwidth scaling policy.

    The name consists of only letters, digits, underscores (_), and hyphens (-).

    N/A

    EIP

    Specifies the public network IP address whose bandwidth needs to be scaled.

    N/A

    Policy Type

    Select Alarm.

    Alarm

    Scaling Action

    Specifies the execution action in the AS policy.

    The following scaling action options are available:
    • Add

      When a scaling action is triggered, the bandwidth is increased.

    • Reduce

      When a scaling action is triggered, the bandwidth is decreased.

    • Set to

      The bandwidth is set to a fixed value.

      NOTE:

      The step (minimum unit for bandwidth adjustment) varies depending on the bandwidth value range. The bandwidth will be automatically adjusted to the nearest value according to the actual step.

      • If the bandwidth is less than or equal to 300 Mbit/s, the default step is 1 Mbit/s.

    N/A

    Cooldown Period

    A cooldown period (in seconds) is the period of time between two scaling actions. AS recounts the cooldown period after a scaling action is complete. During the cooldown period, AS denies all scaling requests triggered by alarm-based policies. Scaling requests triggered manually or by scheduled or periodic policies are not affected.

    300s

    Table 2 Monitoring metrics supported by the alarm policy

    Metric

    Description

    Inbound Bandwidth

    Indicates the network rate of inbound traffic.

    Inbound Traffic

    Indicates the network traffic going out of the cloud platform.

    Outbound Bandwidth

    Indicates the network rate of outbound traffic.

    Outbound Traffic

    Indicates the network traffic going out of the cloud platform.

  5. After setting the parameters, click Create Now.

    The newly created bandwidth scaling policy is displayed on the Bandwidth Scaling page and is in Enabled state by default.

Creating a Scheduled or Periodic Bandwidth Scaling Policy

  1. Log in to the management console.
  2. Under Computing, click Auto Scaling. In the navigation pane on the left, choose Bandwidth Scaling.
  3. Click Create Bandwidth Scaling Policy.
  4. Set parameters, such as the policy name, policy type, and trigger condition. For details, see Table 3.
    Table 3 Scheduled or periodic policy parameters

    Parameter

    Description

    Example Value

    Region

    Specifies the region where the AS group resides.

    N/A

    Policy Name

    Specifies the name of the bandwidth scaling policy.

    The name consists of only letters, digits, underscores (_), and hyphens (-).

    as-policy-p6g5

    EIP

    Specifies the public network IP address whose bandwidth needs to be scaled.

    N/A

    Policy Type

    Specifies the policy type. You can select a scheduled or periodic policy.

    If you select Periodic, you are required to configure two more parameters:

    • Time Range

      Specifies the time range during which the AS policy can be triggered.

    • Period
      • Day
      • Week
      • Month

    N/A

    Triggered At

    Specifies the time at which the AS policy is triggered.

    N/A

    Scaling Action

    Specifies the action to be performed.

    The following scaling action options are available:
    • Add

      When a scaling action is triggered, the bandwidth is increased.

    • Reduce

      When a scaling action is triggered, the bandwidth is decreased.

    • Set to

      The bandwidth is set to a fixed value.

      NOTE:

      The step (minimum unit for bandwidth adjustment) varies depending on the bandwidth value range. The bandwidth will be automatically adjusted to the nearest value according to the actual step.

      • If the bandwidth is less than or equal to 300 Mbit/s, the default step is 1 Mbit/s.

    N/A

    Cooldown Period

    A cooldown period (in seconds) is the period of time between two scaling actions. AS recounts the cooldown period after a scaling action is complete. During the cooldown period, AS denies all scaling requests triggered by alarm-based policies. Scaling requests triggered manually or by scheduled or periodic policies are not affected.

    300s

  5. After setting the parameters, click Create Now.

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