Auto Scaling:Use the Auto Scaling cost estimation feature to estimate resource costs

Procedure

This procedure uses workload type set to Daily Peak Traffic and billing method set to Pay-as-you-go as examples.

1. Log on to the Auto Scaling console.

2. In the top navigation bar, select a region.

3. In the navigation pane on the left, click Scaling Groups.

4. On the Scaling Groups page, click Estimate Cost at the top of the page.

5. On the Estimate Cost page, select a workload type that matches your business scenario (for example, daily peak traffic).

   A workload describes your business resource usage. Select the workload that best reflects your actual usage.

   The following sections describe configuration options for each workload type.

   Daily peak traffic

   When Workload Type is set to Daily Peak Traffic, configure the settings as described in the following table.

   Configuration item	Description	Example
   Days	Select the days of the week that match your workload pattern. You can choose one or more days from Monday through Sunday.	Monday, Tuesday, Wednesday
   Number of Instances that Workload Demands	Specify the minimum number of instances during low-traffic periods and the maximum number during peak periods, as follows: Number of Instances Required During Off-peak Periods: Enter the minimum number of instances required during low-traffic periods. Number of Instances Required During Peak Periods: Enter the maximum number of instances required during peak periods. Note The baseline instance count cannot be greater than the peak instance count.	Number of Instances Required During Off-peak Periods: 5 Number of Instances Required During Peak Periods: 10
   Duration with Peak Traffic	Enter the number of hours and minutes your instances run at peak capacity.	8 hours 30 minutes

   Weekly peak traffic

   When Workload Type is set to Weekly Peak Traffic, configure the settings as described in the following table.

   Configuration item	Description	Example
   Number of Instances that Workload Demands	Specify the minimum number of instances during low-traffic periods and the maximum number during peak periods, as follows: Number of Instances Required During Off-peak Periods: Enter the minimum number of instances required during low-traffic periods. Number of Instances Required During Peak Periods: Enter the maximum number of instances required during peak periods. Note The baseline instance count cannot be greater than the peak instance count.	Number of Instances Required During Off-peak Periods: 1 Number of Instances Required During Peak Periods: 2
   Duration with Peak Traffic	Enter the number of days, hours, and minutes your instances run at peak capacity each week. Note Peak duration cannot exceed 7 days.	3 days 0 hours 0 minutes

   Monthly peak traffic

   When Workload Type is set to Monthly Peak Traffic, configure the settings as described in the following table.

   Configuration item	Description	Example
   Number of Instances that Workload Demands	Specify the minimum number of instances during low-traffic periods and the maximum number during peak periods, as follows: Number of Instances Required During Off-peak Periods: Enter the minimum number of instances required during low-traffic periods. Number of Instances Required During Peak Periods: Enter the maximum number of instances required during peak periods. Note The baseline instance count cannot be greater than the peak instance count.	Number of Instances Required During Off-peak Periods: 1 Number of Instances Required During Peak Periods: 2
   Duration with Peak Traffic	Enter the number of days, hours, and minutes your instances run at peak capacity each month. Note Peak duration cannot exceed 31 days.	8 days 0 hours 0 minutes

6. Select the instance Billing Method, Zone, and Instance Type.

   The following table describes these configuration items.

   Configuration item	Description	Example
   Billing method	You can choose either Pay-as-you-go or Spot Instance. For more information, see pay-as-you-go or spot instance.	Pay-as-you-go
   Zone	You can select different zones within the chosen region, such as Hangzhou Zone K or Hangzhou Zone J. For more information about zones, see Regions and zones.	Hangzhou Zone K
   Instance type	Different instance types provide different levels of computing power. Based on your business scenario, filter suitable instance types by Instance Type, vCPU, and Memory.	ecs.c7.large

7. Click Calculate to begin cost estimation. You can also click Recalculate to re-estimate costs.

   After cost estimation completes, you can view detailed estimated results, such as the pay-as-you-go instance cost. When the calculation finishes, the cost estimation panel shows the billing method as on-demand instance, the current instance type as ecs.c7.large, and the on-demand instance hours (per month) as 2089.286 hours. The current pay-as-you-go billing method saves 56.48% compared to the subscription billing method.

   Note

   • On the resource estimation details page shown above, you can click How to Estimate the Number of Hours to see how the estimated workload hours are calculated.

   • Formula for calculating cost savings percentage:$$\frac{Peak\; instance\; count\times Monthly\; unit\; price-On-demand\; instance\; hours\; (per\; month)\times Hourly\; instance\; price}{Peak\; instance\; count\times Monthly\; unit\; price}$$