What Is the Expected Number of Instances?
The expected number of instances refers to the number of ECS instances that are expected to run in an AS group. It is between the minimum number of instances and the maximum number of instances. You can manually change the expected number of instances or change it based on the scheduled, periodic, or alarm policies.
You can set this parameter when creating an AS group. If this value is greater than 0, a scaling action is performed to add the required number of instances after the AS group is created. You can also change this value manually or by scaling policies after the AS group is created.
If you manually change this value, the current number of instances will be inconsistent with the expected number, and a scaling action will be performed to bring the number of instances in line with the expected number.
If a scaling policy is triggered to add two instances to an AS group, the system will increase the expected number of instances by 2. Then, a scaling action is performed to add two instances so that the number of instances in the AS group is the same as the expected number.
Instance FAQs
- How Do I Prevent Instances Manually Added to an AS Group from Being Automatically Removed?
- When There Are Multiple Flavors Included in the AS Configuration of an AS Group, What Order Are the Flavors Selected in During Scale-out Events?
- When an Instance Is Removed from an AS Group and Deleted, Is the Application Data Saved?
- Can I Add Yearly/Monthly ECS Instances to an AS Group?
- Can the System Automatically Delete the Instances Added Based on an AS Policy When They Are Not Required?
- What Is the Expected Number of Instances?
- How Do I Delete an ECS Instance Created in a Scaling Action?
- Will a Yearly/Monthly ECS Instance Be Deleted If It Becomes Unhealthy?
- How Do I Handle Unhealthy Instances in an AS Group?
- Why Instances in an AS Group Keep Failing Health Checks and Getting Deleted and Recreated?
- How Do I Prevent Instances from Being Automatically Removed from an AS Group?
- Why Is an Instance that Was Removed from an AS Group and Deleted Still Displayed in the ECS List?
- Do I Need to Bind an EIP to an Instance Before I Manually Add the Instance to an AS Group?
- Can I Apply the Configurations of an Existing Instance in an AS Group to Instances to Be Added in the Future?
- Will the System Bind a New EIP or an Existing One a Newly Added ECS Instance?
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